diff --git a/src/Booking/BoardPresenter.php b/src/Booking/BoardPresenter.php
index d83142e..10d134c 100644
--- a/src/Booking/BoardPresenter.php
+++ b/src/Booking/BoardPresenter.php
@@ -98,11 +98,11 @@ final readonly class BoardPresenter
      */
     public static function urlParameters(ResourceType $type, \DateTimeImmutable $date, TimeRange $time): array
     {
-        $parameters = ['type' => $type->slug(), 'tag' => $date->format('Y-m-d')];
+        $parameters = ['type' => $type->value, 'date' => $date->format('Y-m-d')];
 
         if (!$time->isAllDay()) {
-            $parameters['von'] = $time->start();
-            $parameters['bis'] = $time->end();
+            $parameters['from'] = $time->start();
+            $parameters['to'] = $time->end();
         }
 
         return $parameters;
diff --git a/src/Booking/TimeRange.php b/src/Booking/TimeRange.php
index 06b8c31..6160a09 100644
--- a/src/Booking/TimeRange.php
+++ b/src/Booking/TimeRange.php
@@ -21,11 +21,11 @@ final readonly class TimeRange implements \Stringable
         public int $endMinute,
     ) {
         if ($startMinute < self::DAY_START || $endMinute > self::DAY_END) {
-            throw new \InvalidArgumentException('Eine Buchung muss innerhalb eines Tages liegen.');
+            throw new \InvalidArgumentException('A time range must stay within a single day.');
         }
 
         if ($startMinute >= $endMinute) {
-            throw new \InvalidArgumentException('Das Ende muss nach dem Beginn liegen.');
+            throw new \InvalidArgumentException('A time range must end after it starts.');
         }
     }
 
diff --git a/src/Command/SeedCommand.php b/src/Command/SeedCommand.php
index f354981..e7ca84b 100644
--- a/src/Command/SeedCommand.php
+++ b/src/Command/SeedCommand.php
@@ -66,7 +66,7 @@ final class SeedCommand extends Command
 
         $this->em->flush();
 
-        $io->success(\sprintf('%d neue Datensätze angelegt.', $created));
+        $io->success(\sprintf('%d new records created.', $created));
 
         return Command::SUCCESS;
     }
diff --git a/src/Controller/BoardController.php b/src/Controller/BoardController.php
index fd50efc..3438951 100644
--- a/src/Controller/BoardController.php
+++ b/src/Controller/BoardController.php
@@ -29,11 +29,11 @@ final class BoardController extends AbstractController
     {
     }
 
-    #[Route('/buchen/{type}', name: 'app_board', requirements: ['type' => '[a-z]+'], methods: ['GET'])]
+    #[Route('/book/{type}', name: 'app_board', requirements: ['type' => '[a-z]+'], methods: ['GET'])]
     public function index(Request $request, string $type): Response
     {
         $resourceType = $this->resourceType($type);
-        $date = DateParam::parseOrToday($request->query->getString('tag'));
+        $date = DateParam::parseOrToday($request->query->getString('date'));
 
         return $this->render('board/index.html.twig', $this->board->context(
             $resourceType,
@@ -51,7 +51,7 @@ final class BoardController extends AbstractController
      * client-side event choreography. Requests without the htmx header get a plain redirect
      * rather than a bare pair of fragments, so the URL stays shareable.
      */
-    #[Route('/buchen/{type}/tag/{date}', name: 'app_board_day', requirements: ['type' => '[a-z]+', 'date' => DateParam::PATTERN], methods: ['GET'])]
+    #[Route('/book/{type}/day/{date}', name: 'app_board_day', requirements: ['type' => '[a-z]+', 'date' => DateParam::PATTERN], methods: ['GET'])]
     public function day(Request $request, string $type, string $date): Response
     {
         $resourceType = $this->resourceType($type);
@@ -76,19 +76,17 @@ final class BoardController extends AbstractController
      */
     public static function timeOf(Request $request): TimeRange
     {
-        return TimeRange::parse($request->query->getString('von'), $request->query->getString('bis'))
+        return TimeRange::parse($request->query->getString('from'), $request->query->getString('to'))
             ?? TimeRange::wholeDay();
     }
 
     /**
-     * Route requirements cannot call a method, so the slug is matched loosely and resolved here.
+     * Route requirements cannot enumerate the enum, so {type} is matched loosely and resolved
+     * here -- an unknown kind is a 404 rather than a 500.
      */
-    private function resourceType(string $slug): ResourceType
+    private function resourceType(string $value): ResourceType
     {
-        try {
-            return ResourceType::fromSlug($slug);
-        } catch (\ValueError $e) {
-            throw $this->createNotFoundException($e->getMessage(), $e);
-        }
+        return ResourceType::tryFrom($value)
+            ?? throw $this->createNotFoundException(\sprintf('Unknown bookable kind "%s".', $value));
     }
 }
diff --git a/src/Controller/BookingController.php b/src/Controller/BookingController.php
index a80224a..ee07af4 100644
--- a/src/Controller/BookingController.php
+++ b/src/Controller/BookingController.php
@@ -40,7 +40,7 @@ final class BookingController extends AbstractController
     ) {
     }
 
-    #[Route('/buchungen', name: 'app_booking', methods: ['GET'])]
+    #[Route('/bookings', name: 'app_booking', methods: ['GET'])]
     public function index(): Response
     {
         $today = new \DateTimeImmutable('today');
@@ -60,11 +60,11 @@ final class BookingController extends AbstractController
      * out-of-band board blocks, so the modal's outerHTML target is swapped with an empty
      * fragment and the modal simply disappears.
      */
-    #[Route('/buchungen/neu/{id}/{date}', name: 'app_booking_new', requirements: ['date' => DateParam::PATTERN], methods: ['GET', 'POST'])]
+    #[Route('/bookings/new/{id}/{date}', name: 'app_booking_new', requirements: ['date' => DateParam::PATTERN], methods: ['GET', 'POST'])]
     public function create(Request $request, Resource $resource, string $date): Response
     {
         if (!$resource->isActive()) {
-            throw $this->createNotFoundException('Diese Ressource wird nicht mehr angeboten.');
+            throw $this->createNotFoundException('This resource has been retired.');
         }
 
         $selected = DateParam::parseOrToday($date);
@@ -110,7 +110,7 @@ final class BookingController extends AbstractController
      * Moves one occurrence, which is what an "override" of a series is: the other occurrences
      * are untouched and this one is flagged as differing from its series.
      */
-    #[Route('/buchungen/{id}/bearbeiten', name: 'app_booking_edit', methods: ['GET', 'POST'])]
+    #[Route('/bookings/{id}/edit', name: 'app_booking_edit', methods: ['GET', 'POST'])]
     public function edit(Request $request, Booking $booking): Response
     {
         $this->denyUnlessOwn($booking);
@@ -145,7 +145,7 @@ final class BookingController extends AbstractController
         ]);
     }
 
-    #[Route('/buchungen/{id}/freigeben', name: 'app_booking_release', methods: ['POST'])]
+    #[Route('/bookings/{id}/release', name: 'app_booking_release', methods: ['POST'])]
     public function release(Request $request, Booking $booking): Response
     {
         $this->denyUnlessOwn($booking);
@@ -169,11 +169,11 @@ final class BookingController extends AbstractController
     /**
      * Ends a series from today onwards. Past occurrences are history and stay put.
      */
-    #[Route('/serien/{id}/beenden', name: 'app_series_end', methods: ['POST'])]
+    #[Route('/series/{id}/end', name: 'app_series_end', methods: ['POST'])]
     public function endSeries(Request $request, BookingSeries $series): Response
     {
         if ($series->getUser()->getId() !== $this->currentUser()->getId()) {
-            throw $this->createAccessDeniedException('Fremde Serien können nicht beendet werden.');
+            throw $this->createAccessDeniedException('A series may only be ended by the person who created it.');
         }
 
         $this->denyUnlessCsrfValid($request, 'end-series-'.$series->getId());
@@ -252,20 +252,20 @@ final class BookingController extends AbstractController
      */
     private function timeParameters(TimeRange $time): array
     {
-        return $time->isAllDay() ? [] : ['von' => $time->start(), 'bis' => $time->end()];
+        return $time->isAllDay() ? [] : ['from' => $time->start(), 'to' => $time->end()];
     }
 
     private function denyUnlessOwn(Booking $booking): void
     {
         if (!$booking->belongsTo($this->currentUser())) {
-            throw $this->createAccessDeniedException('Fremde Buchungen können nicht geändert werden.');
+            throw $this->createAccessDeniedException('A booking may only be changed by the person holding it.');
         }
     }
 
     private function denyUnlessCsrfValid(Request $request, string $tokenId): void
     {
         if (!$this->isCsrfTokenValid($tokenId, $request->request->getString('_token'))) {
-            throw $this->createAccessDeniedException('Ungültiges CSRF-Token.');
+            throw $this->createAccessDeniedException('Invalid CSRF token.');
         }
     }
 }
diff --git a/src/Entity/ResourceType.php b/src/Entity/ResourceType.php
index b95747e..3678434 100644
--- a/src/Entity/ResourceType.php
+++ b/src/Entity/ResourceType.php
@@ -8,13 +8,14 @@ namespace App\Entity;
  * The kinds of thing that can be booked.
  *
  * **This enum is the extension point.** The dashboard builds one tile per case, the board route
- * accepts one slug per case, and the floor plan is looked up by convention from the case's
- * value. Adding a third bookable kind is therefore: a case here, a
+ * accepts one backing value per case, and the floor plan is looked up by convention from that
+ * same value. Adding a third bookable kind is therefore: a case here, a
  * `templates/board/plan/_<value>.html.twig` with its geometry, and rows in `app:seed`. Nothing
  * else needs editing — in particular no template lists the kinds by hand.
  *
- * The backing values are persisted in `resource.type`, which is why they stay English while the
- * URLs do not: `slug()` is what appears in a path, so the routes read German like the rest.
+ * The backing value is both what is persisted in `resource.type` and what appears in a URL, so
+ * there is no slug mapping to keep in sync. The label, plural and description are the only
+ * things here anyone sees, which is why they are the only German ones.
  */
 enum ResourceType: string
 {
@@ -52,24 +53,4 @@ enum ResourceType: string
             self::PARKING => 'lucide:car',
         };
     }
-
-    /** What appears in a URL. */
-    public function slug(): string
-    {
-        return match ($this) {
-            self::DESK => 'schreibtische',
-            self::PARKING => 'parkplaetze',
-        };
-    }
-
-    public static function fromSlug(string $slug): self
-    {
-        foreach (self::cases() as $case) {
-            if ($case->slug() === $slug) {
-                return $case;
-            }
-        }
-
-        throw new \ValueError(\sprintf('"%s" ist kein bekannter Buchungsbereich.', $slug));
-    }
 }
diff --git a/src/Security/OAuth2/EpClient.php b/src/Security/OAuth2/EpClient.php
index b55ab8d..4c1bd2a 100644
--- a/src/Security/OAuth2/EpClient.php
+++ b/src/Security/OAuth2/EpClient.php
@@ -74,11 +74,11 @@ class EpClient
 
         $code = $request->query->get('code');
         if (null === $code || '' === $code) {
-            throw new AuthorizationRequestException('Die Antwort von myep enthielt keinen Code.');
+            throw new AuthorizationRequestException('The callback from myep carried no authorization code.');
         }
 
         if (null === $expectedState || $request->query->get('state') !== $expectedState) {
-            throw new AuthorizationRequestException('Der state-Parameter passt nicht zur Sitzung.');
+            throw new AuthorizationRequestException('The state parameter does not match the one this session started with.');
         }
 
         return $this->getProvider()->getAccessToken('authorization_code', ['code' => $code]);
@@ -107,13 +107,13 @@ class EpClient
                 ['headers' => ['Accept' => 'application/json']],
             ));
         } catch (ClientExceptionInterface $e) {
-            throw new UserinfoUnavailableException('userinfo konnte nicht abgerufen werden.', previous: $e);
+            throw new UserinfoUnavailableException('The userinfo endpoint could not be reached.', previous: $e);
         }
 
         $userinfo = json_decode((string) $response->getBody(), true);
 
         if (!\is_array($userinfo)) {
-            throw new UserinfoUnavailableException('userinfo lieferte keine lesbare Antwort.');
+            throw new UserinfoUnavailableException('The userinfo endpoint returned an unreadable payload.');
         }
 
         return $userinfo;
diff --git a/templates/board/_calendar.html.twig b/templates/board/_calendar.html.twig
index ae5776b..d4fa6d0 100644
--- a/templates/board/_calendar.html.twig
+++ b/templates/board/_calendar.html.twig
@@ -2,14 +2,14 @@
    requests whose response carries nothing but out-of-band blocks, hence hx-swap="none". #}
 {% set weekdays = ['Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa', 'So'] %}
 {# Every link keeps the board's span, so changing the day never silently widens it back to all-day. #}
-{% set time_params = selected_time.allDay ? {} : { von: selected_time.start, bis: selected_time.end } %}
+{% set time_params = selected_time.allDay ? {} : { from: selected_time.start, to: selected_time.end } %}
 
 <div class="rounded-md border border-gray-200 p-4">
     <div class="flex items-center justify-between pb-4">
         <button type="button"
                 class="p-1 rounded-md hover:bg-gray-100"
                 aria-label="Voriger Monat"
-                hx-get="{{ path('app_board_day', { type: type.slug, date: month_start|date_modify('-1 month')|date('Y-m-d') }|merge(time_params)) }}"
+                hx-get="{{ path('app_board_day', { type: type.value, date: month_start|date_modify('-1 month')|date('Y-m-d') }|merge(time_params)) }}"
                 hx-swap="none">
             {{ ux_icon('lucide:chevron-left', { class: 'w-5 h-5' }) }}
         </button>
@@ -19,7 +19,7 @@
         <button type="button"
                 class="p-1 rounded-md hover:bg-gray-100"
                 aria-label="Nächster Monat"
-                hx-get="{{ path('app_board_day', { type: type.slug, date: month_start|date_modify('+1 month')|date('Y-m-d') }|merge(time_params)) }}"
+                hx-get="{{ path('app_board_day', { type: type.value, date: month_start|date_modify('+1 month')|date('Y-m-d') }|merge(time_params)) }}"
                 hx-swap="none">
             {{ ux_icon('lucide:chevron-right', { class: 'w-5 h-5' }) }}
         </button>
@@ -49,7 +49,7 @@
                 <button type="button"
                         class="{{ classes }}"
                         aria-pressed="{{ day.is_selected ? 'true' : 'false' }}"
-                        hx-get="{{ path('app_board_day', { type: type.slug, date: day.date|date('Y-m-d') }|merge(time_params)) }}"
+                        hx-get="{{ path('app_board_day', { type: type.value, date: day.date|date('Y-m-d') }|merge(time_params)) }}"
                         hx-swap="none">
                     <span>{{ day.date|date('j') }}</span>
                     {# Team view: the occupancy count is the whole point of showing the month. #}
diff --git a/templates/board/_floorplan.html.twig b/templates/board/_floorplan.html.twig
index 36e90d6..eed0167 100644
--- a/templates/board/_floorplan.html.twig
+++ b/templates/board/_floorplan.html.twig
@@ -4,8 +4,8 @@
     partial there and nothing else.
 
     Colouring needs no JavaScript at all: the plan is re-rendered server side for the selected day
-    and span, so free/belegt/deine is decided in Twig. Note "free" is always relative to the span
-    in the header -- a desk booked 09:00-13:00 is free for an afternoon board and belegt for an
+    and span, so free/taken/yours is decided in Twig. Note "free" is always relative to the span
+    in the header -- a desk booked 09:00-13:00 is free for an afternoon board and taken for an
     all-day one.
 #}
 <div class="rounded-md border border-gray-200 p-4">
diff --git a/templates/board/_timerange.html.twig b/templates/board/_timerange.html.twig
index b565389..b63f8c5 100644
--- a/templates/board/_timerange.html.twig
+++ b/templates/board/_timerange.html.twig
@@ -1,5 +1,5 @@
 {#
-    The span the whole board is relative to. Free/belegt has no answer without it once bookings
+    The span the whole board is relative to. Free/taken has no answer without it once bookings
     can cover part of a day, so this drives the plan colours AND the calendar occupancy counts.
 
     Both fields hit the same fragment endpoint as the calendar does, so narrowing the span is the
@@ -12,27 +12,27 @@
 
 <div class="flex flex-wrap items-end gap-3 pb-4" id="board-timerange">
     <div>
-        <label class="block text-xs text-gray-500 pb-1" for="board-von">Von</label>
-        <input type="time" id="board-von" name="von" value="{{ selected_time.allDay ? '' : selected_time.start }}" step="900"
+        <label class="block text-xs text-gray-500 pb-1" for="board-from">Von</label>
+        <input type="time" id="board-from" name="from" value="{{ selected_time.allDay ? '' : selected_time.start }}" step="900"
                class="rounded-md border-0 py-1.5 text-sm text-gray-900 shadow-sm ring-1 ring-inset ring-gray-300 focus:ring-2 focus:ring-inset focus:ring-primary"
-               hx-get="{{ path('app_board_day', { type: type.slug, date: day }) }}"
-               hx-include="#board-bis"
+               hx-get="{{ path('app_board_day', { type: type.value, date: day }) }}"
+               hx-include="#board-to"
                hx-trigger="change"
                hx-swap="none">
     </div>
     <div>
-        <label class="block text-xs text-gray-500 pb-1" for="board-bis">Bis</label>
-        <input type="time" id="board-bis" name="bis" value="{{ selected_time.allDay ? '' : selected_time.end }}" step="900"
+        <label class="block text-xs text-gray-500 pb-1" for="board-to">Bis</label>
+        <input type="time" id="board-to" name="to" value="{{ selected_time.allDay ? '' : selected_time.end }}" step="900"
                class="rounded-md border-0 py-1.5 text-sm text-gray-900 shadow-sm ring-1 ring-inset ring-gray-300 focus:ring-2 focus:ring-inset focus:ring-primary"
-               hx-get="{{ path('app_board_day', { type: type.slug, date: day }) }}"
-               hx-include="#board-von"
+               hx-get="{{ path('app_board_day', { type: type.value, date: day }) }}"
+               hx-include="#board-from"
                hx-trigger="change"
                hx-swap="none">
     </div>
 
     {% if not selected_time.allDay %}
         <button type="button" class="button button--small button--neutral"
-                hx-get="{{ path('app_board_day', { type: type.slug, date: day }) }}"
+                hx-get="{{ path('app_board_day', { type: type.value, date: day }) }}"
                 hx-swap="none">
             Ganzer Tag
         </button>
diff --git a/templates/board/plan/_desk.html.twig b/templates/board/plan/_desk.html.twig
index 72e4cf0..5c7bf93 100644
--- a/templates/board/plan/_desk.html.twig
+++ b/templates/board/plan/_desk.html.twig
@@ -13,7 +13,7 @@
     'desk-07': { x:  40, y: 260 }, 'desk-08': { x: 200, y: 260 }, 'desk-09': { x: 360, y: 260 },
     'desk-10': { x:  40, y: 360 }, 'desk-11': { x: 200, y: 360 }, 'desk-12': { x: 360, y: 360 }
 } %}
-{% set time_params = selected_time.allDay ? {} : { von: selected_time.start, bis: selected_time.end } %}
+{% set time_params = selected_time.allDay ? {} : { from: selected_time.start, to: selected_time.end } %}
 
 <svg viewBox="0 0 520 460" class="w-full h-auto" role="img" aria-label="Raumplan Büro">
     <rect x="10" y="20" width="500" height="420" rx="8" class="fill-white stroke-gray-300" stroke-width="2"></rect>
diff --git a/templates/board/plan/_parking.html.twig b/templates/board/plan/_parking.html.twig
index 3f89eb5..68e20a8 100644
--- a/templates/board/plan/_parking.html.twig
+++ b/templates/board/plan/_parking.html.twig
@@ -8,7 +8,7 @@
     'parking-01': { x:  40, y:  60 }, 'parking-02': { x:  40, y: 130 }, 'parking-03': { x:  40, y: 200 },
     'parking-04': { x: 280, y:  60 }, 'parking-05': { x: 280, y: 130 }, 'parking-06': { x: 280, y: 200 }
 } %}
-{% set time_params = selected_time.allDay ? {} : { von: selected_time.start, bis: selected_time.end } %}
+{% set time_params = selected_time.allDay ? {} : { from: selected_time.start, to: selected_time.end } %}
 
 <svg viewBox="0 0 520 300" class="w-full h-auto" role="img" aria-label="Parkplatz">
     <rect x="10" y="20" width="500" height="260" rx="8" class="fill-white stroke-gray-300" stroke-width="2"></rect>
diff --git a/templates/board/plan/_spot.html.twig b/templates/board/plan/_spot.html.twig
index 1a7abcb..617dfc0 100644
--- a/templates/board/plan/_spot.html.twig
+++ b/templates/board/plan/_spot.html.twig
@@ -1,6 +1,6 @@
 {#
     The shared shape a plan is drawn from. Imported by each board/plan/_<type>.html.twig, so the
-    per-type partials carry geometry only and free/belegt/deine looks identical everywhere.
+    per-type partials carry geometry only and free/taken/yours looks identical everywhere.
 
     Clicking always opens a modal: the create modal when free, the edit modal when it is yours
     (which is where changing the times and releasing live). Nothing else is clickable, so the SVG
diff --git a/templates/booking/index.html.twig b/templates/booking/index.html.twig
index 2b142f5..640dfe9 100644
--- a/templates/booking/index.html.twig
+++ b/templates/booking/index.html.twig
@@ -57,7 +57,7 @@
                     </div>
                     <div class="flex items-center gap-3">
                         <a class="text-sm underline"
-                           href="{{ path('app_board', { type: booking.resource.type.slug, tag: booking.date|date('Y-m-d') }) }}">Im Plan</a>
+                           href="{{ path('app_board', { type: booking.resource.type.value, date: booking.date|date('Y-m-d') }) }}">Im Plan</a>
                         {# Ordinary form post: this page has no board fragments to swap, so it
                            reloads afterwards rather than pretending to be htmx. #}
                         <form method="post" action="{{ path('app_booking_release', { id: booking.id }) }}">
diff --git a/templates/dashboard/index.html.twig b/templates/dashboard/index.html.twig
index ad2b995..f62d7ba 100644
--- a/templates/dashboard/index.html.twig
+++ b/templates/dashboard/index.html.twig
@@ -12,7 +12,7 @@
     #}
     <div class="mt-8 grid gap-4 sm:grid-cols-2 lg:grid-cols-3">
         {% for tile in tiles %}
-            <a href="{{ path('app_board', { type: tile.type.slug }) }}"
+            <a href="{{ path('app_board', { type: tile.type.value }) }}"
                class="group flex flex-col rounded-md border border-gray-200 p-6 hover:border-primary hover:bg-gray-50">
                 <div class="flex items-center gap-3 pb-2">
                     {{ ux_icon(tile.type.icon, { class: 'h-6 w-6 shrink-0 text-primary' }) }}
@@ -70,7 +70,7 @@
                         </div>
                     </div>
                     <a class="text-sm underline shrink-0"
-                       href="{{ path('app_board', { type: booking.resource.type.slug, tag: booking.date|date('Y-m-d') }) }}">
+                       href="{{ path('app_board', { type: booking.resource.type.value, date: booking.date|date('Y-m-d') }) }}">
                         Im Plan
                     </a>
                 </li>
diff --git a/tests/Controller/BookingControllerTest.php b/tests/Controller/BookingControllerTest.php
index 69ae732..da4b081 100644
--- a/tests/Controller/BookingControllerTest.php
+++ b/tests/Controller/BookingControllerTest.php
@@ -44,11 +44,11 @@ class BookingControllerTest extends WebTestCase
     {
         $this->client->loginUser($this->user('anna@ep-reisen.de'));
 
-        $this->client->request('GET', '/buchen/schreibtische/tag/2026-10-01', server: ['HTTP_HX-Request' => 'true']);
+        $this->client->request('GET', '/book/desk/day/2026-10-01', server: ['HTTP_HX-Request' => 'true']);
         $response = $this->client->getResponse();
 
         self::assertResponseIsSuccessful();
-        self::assertSame('/buchen/schreibtische?tag=2026-10-01', $response->headers->get('HX-Push-Url'));
+        self::assertSame('/book/desk?date=2026-10-01', $response->headers->get('HX-Push-Url'));
         self::assertSame(2, substr_count((string) $response->getContent(), 'hx-swap-oob="true"'));
         self::assertStringContainsString('id="board-calendar"', (string) $response->getContent());
         self::assertStringContainsString('id="board-floorplan"', (string) $response->getContent());
@@ -58,9 +58,9 @@ class BookingControllerTest extends WebTestCase
     {
         $this->client->loginUser($this->user('anna@ep-reisen.de'));
 
-        $this->client->request('GET', '/buchen/schreibtische/tag/2026-10-01');
+        $this->client->request('GET', '/book/desk/day/2026-10-01');
 
-        self::assertResponseRedirects('/buchen/schreibtische?tag=2026-10-01');
+        self::assertResponseRedirects('/book/desk?date=2026-10-01');
     }
 
     /**
@@ -146,7 +146,7 @@ class BookingControllerTest extends WebTestCase
         $this->client->loginUser($this->user('anna@ep-reisen.de'));
         $desk = $this->resource('D1');
 
-        $this->client->request('POST', \sprintf('/buchungen/neu/%d/2026-10-01', $desk->getId()), [
+        $this->client->request('POST', \sprintf('/bookings/new/%d/2026-10-01', $desk->getId()), [
             'booking' => ['date' => '2026-10-01', '_token' => 'nope'],
         ], server: ['HTTP_HX-Request' => 'true']);
 
@@ -167,7 +167,7 @@ class BookingControllerTest extends WebTestCase
         $this->em->flush();
 
         $this->client->loginUser($this->user('anna@ep-reisen.de'));
-        $this->client->request('POST', \sprintf('/buchungen/%d/freigeben', $booking->getId()), server: ['HTTP_HX-Request' => 'true']);
+        $this->client->request('POST', \sprintf('/bookings/%d/release', $booking->getId()), server: ['HTTP_HX-Request' => 'true']);
 
         $response = $this->client->getResponse();
         self::assertSame('body', $response->headers->get('HX-Retarget'));
@@ -186,11 +186,11 @@ class BookingControllerTest extends WebTestCase
 
         // Releasing lives in the edit modal now, not on the floor plan -- clicking your own desk
         // opens that modal, and the token is rendered there.
-        $crawler = $this->client->request('GET', \sprintf('/buchungen/%d/bearbeiten', $id), server: ['HTTP_HX-Request' => 'true']);
-        $vals = $crawler->filter(\sprintf('[hx-post="/buchungen/%d/freigeben"]', $id))->attr('hx-vals');
+        $crawler = $this->client->request('GET', \sprintf('/bookings/%d/edit', $id), server: ['HTTP_HX-Request' => 'true']);
+        $vals = $crawler->filter(\sprintf('[hx-post="/bookings/%d/release"]', $id))->attr('hx-vals');
         $token = json_decode((string) $vals, true, flags: \JSON_THROW_ON_ERROR)['_token'];
 
-        $this->client->request('POST', \sprintf('/buchungen/%d/freigeben', $id), ['_token' => $token], server: ['HTTP_HX-Request' => 'true']);
+        $this->client->request('POST', \sprintf('/bookings/%d/release', $id), ['_token' => $token], server: ['HTTP_HX-Request' => 'true']);
 
         self::assertResponseIsSuccessful();
         self::assertSame(3, substr_count((string) $this->client->getResponse()->getContent(), 'hx-swap-oob="true"'));
@@ -205,9 +205,9 @@ class BookingControllerTest extends WebTestCase
         $this->em->flush();
 
         $this->client->loginUser($anna);
-        $crawler = $this->client->request('GET', '/buchen/schreibtische?tag=2026-10-01');
+        $crawler = $this->client->request('GET', '/book/desk?date=2026-10-01');
 
-        self::assertCount(1, $crawler->filter(\sprintf('[hx-get="/buchungen/%d/bearbeiten"]', $booking->getId())));
+        self::assertCount(1, $crawler->filter(\sprintf('[hx-get="/bookings/%d/edit"]', $booking->getId())));
     }
 
     public function testBookingPartOfADay(): void
@@ -338,7 +338,7 @@ class BookingControllerTest extends WebTestCase
 
         $crawler = $this->client->request(
             'GET',
-            \sprintf('/buchungen/neu/%d/2026-10-01?von=09:00&bis=13:00', $desk->getId()),
+            \sprintf('/bookings/new/%d/2026-10-01?from=09:00&to=13:00', $desk->getId()),
             server: ['HTTP_HX-Request' => 'true'],
         );
 
@@ -351,10 +351,10 @@ class BookingControllerTest extends WebTestCase
     {
         $this->client->loginUser($this->user('anna@ep-reisen.de'));
 
-        $this->client->request('GET', '/buchen/schreibtische/tag/2026-10-01?von=09:00&bis=13:00', server: ['HTTP_HX-Request' => 'true']);
+        $this->client->request('GET', '/book/desk/day/2026-10-01?from=09:00&to=13:00', server: ['HTTP_HX-Request' => 'true']);
 
         self::assertResponseIsSuccessful();
-        self::assertSame('/buchen/schreibtische?tag=2026-10-01&von=09:00&bis=13:00', $this->client->getResponse()->headers->get('HX-Push-Url'));
+        self::assertSame('/book/desk?date=2026-10-01&from=09:00&to=13:00', $this->client->getResponse()->headers->get('HX-Push-Url'));
     }
 
     public function testOverridingOneOccurrenceLeavesTheSeriesAlone(): void
@@ -375,7 +375,7 @@ class BookingControllerTest extends WebTestCase
         self::assertCount(4, $occurrences);
         $first = $occurrences[0];
 
-        $crawler = $this->client->request('GET', \sprintf('/buchungen/%d/bearbeiten', $first->getId()), server: ['HTTP_HX-Request' => 'true']);
+        $crawler = $this->client->request('GET', \sprintf('/bookings/%d/edit', $first->getId()), server: ['HTTP_HX-Request' => 'true']);
         // Only the span is editable here: the day and the recurrence belong to the series.
         self::assertCount(0, $crawler->filter('#booking_date'));
         self::assertCount(0, $crawler->filter('#booking_repeat'));
@@ -410,7 +410,7 @@ class BookingControllerTest extends WebTestCase
      */
     private function submitBookingModal(Resource $resource, string $routeDate, array $fields = ['allDay' => '1']): Response
     {
-        $url = \sprintf('/buchungen/neu/%d/%s', $resource->getId(), $routeDate);
+        $url = \sprintf('/bookings/new/%d/%s', $resource->getId(), $routeDate);
         $crawler = $this->client->request('GET', $url, server: ['HTTP_HX-Request' => 'true']);
         self::assertResponseIsSuccessful();
 
diff --git a/tests/Controller/DashboardControllerTest.php b/tests/Controller/DashboardControllerTest.php
index 4443814..d5a67e5 100644
--- a/tests/Controller/DashboardControllerTest.php
+++ b/tests/Controller/DashboardControllerTest.php
@@ -46,8 +46,8 @@ class DashboardControllerTest extends WebTestCase
         foreach (ResourceType::cases() as $type) {
             self::assertCount(
                 1,
-                $crawler->filter(\sprintf('a[href="/buchen/%s"]', $type->slug())),
-                \sprintf('no dashboard tile links to the %s board', $type->slug()),
+                $crawler->filter(\sprintf('a[href="/book/%s"]', $type->value)),
+                \sprintf('no dashboard tile links to the %s board', $type->value),
             );
             self::assertStringContainsString($type->plural(), $crawler->html());
         }
@@ -61,7 +61,7 @@ class DashboardControllerTest extends WebTestCase
         $this->client->loginUser($this->user());
         $crawler = $this->client->request('GET', '/');
 
-        self::assertCount(1, $crawler->filter('a[href="/buchungen"]'));
+        self::assertCount(1, $crawler->filter('a[href="/bookings"]'));
     }
 
     public function testTheNavigationIsGone(): void
@@ -86,7 +86,7 @@ class DashboardControllerTest extends WebTestCase
         $this->client->loginUser($user);
         $crawler = $this->client->request('GET', '/');
 
-        $tile = $crawler->filter('a[href="/buchen/schreibtische"]')->text();
+        $tile = $crawler->filter('a[href="/book/desk"]')->text();
         self::assertStringContainsString('von 2 heute frei', $tile);
         self::assertStringContainsString('1', $tile);
     }
@@ -104,7 +104,7 @@ class DashboardControllerTest extends WebTestCase
         $this->client->loginUser($this->user());
         $crawler = $this->client->request('GET', '/');
 
-        self::assertStringContainsString('heute alles belegt', $crawler->filter('a[href="/buchen/schreibtische"]')->text());
+        self::assertStringContainsString('heute alles belegt', $crawler->filter('a[href="/book/desk"]')->text());
     }
 
     public function testYourOwnBookingIsCalledOutOnTheTile(): void
@@ -116,7 +116,7 @@ class DashboardControllerTest extends WebTestCase
         $this->client->loginUser($user);
         $crawler = $this->client->request('GET', '/');
 
-        self::assertStringContainsString('D1', $crawler->filter('a[href="/buchen/schreibtische"]')->text());
+        self::assertStringContainsString('D1', $crawler->filter('a[href="/book/desk"]')->text());
     }
 
     public function testABoardOnlyShowsItsOwnKindOfResource(): void
@@ -126,11 +126,11 @@ class DashboardControllerTest extends WebTestCase
 
         $this->client->loginUser($this->user());
 
-        $desks = $this->client->request('GET', '/buchen/schreibtische')->html();
+        $desks = $this->client->request('GET', '/book/desk')->html();
         self::assertStringContainsString('D1', $desks);
         self::assertStringNotContainsString('P1', $desks);
 
-        $parking = $this->client->request('GET', '/buchen/parkplaetze')->html();
+        $parking = $this->client->request('GET', '/book/parking')->html();
         self::assertStringContainsString('P1', $parking);
         self::assertStringNotContainsString('D1', $parking);
     }
@@ -138,7 +138,7 @@ class DashboardControllerTest extends WebTestCase
     public function testAnUnknownBookingAreaIsNotFound(): void
     {
         $this->client->loginUser($this->user());
-        $this->client->request('GET', '/buchen/fahrraeder');
+        $this->client->request('GET', '/book/bikes');
 
         self::assertResponseStatusCodeSame(404);
     }
@@ -149,7 +149,7 @@ class DashboardControllerTest extends WebTestCase
 
         self::assertStringContainsString(
             'noch nichts eingerichtet',
-            $this->client->request('GET', '/buchen/parkplaetze')->html(),
+            $this->client->request('GET', '/book/parking')->html(),
         );
     }
 
diff --git a/tests/Entity/ResourceTypeTest.php b/tests/Entity/ResourceTypeTest.php
index 53cd521..0a8b5ea 100644
--- a/tests/Entity/ResourceTypeTest.php
+++ b/tests/Entity/ResourceTypeTest.php
@@ -9,35 +9,27 @@ use PHPUnit\Framework\TestCase;
 
 class ResourceTypeTest extends TestCase
 {
-    public function testEverySlugResolvesBackToItsCase(): void
+    /**
+     * The backing value is what appears in a URL, so it has to survive the round trip -- there
+     * is deliberately no separate slug mapping to keep in sync.
+     */
+    public function testEveryValueResolvesBackToItsCase(): void
     {
         foreach (ResourceType::cases() as $type) {
-            self::assertSame($type, ResourceType::fromSlug($type->slug()));
+            self::assertSame($type, ResourceType::tryFrom($type->value));
         }
     }
 
-    public function testSlugsAreUnique(): void
+    public function testAnUnknownValueResolvesToNothing(): void
     {
-        $slugs = array_map(static fn (ResourceType $type): string => $type->slug(), ResourceType::cases());
-
-        self::assertSame($slugs, array_unique($slugs));
+        self::assertNull(ResourceType::tryFrom('bikes'));
     }
 
-    public function testAnUnknownSlugIsRejected(): void
+    public function testValuesAreUrlSafe(): void
     {
-        $this->expectException(\ValueError::class);
-
-        ResourceType::fromSlug('fahrraeder');
-    }
-
-    /**
-     * The URL slugs are German while the backing values stay English, because the values are
-     * persisted in resource.type and renaming them would need a migration.
-     */
-    public function testTheSlugIsNotTheStoredValue(): void
-    {
-        self::assertSame('desk', ResourceType::DESK->value);
-        self::assertSame('schreibtische', ResourceType::DESK->slug());
+        foreach (ResourceType::cases() as $type) {
+            self::assertMatchesRegularExpression('/^[a-z]+$/', $type->value);
+        }
     }
 
     /**
diff --git a/tests/EventListener/HtmxExceptionListenerFunctionalTest.php b/tests/EventListener/HtmxExceptionListenerFunctionalTest.php
index c31c43d..40ade03 100644
--- a/tests/EventListener/HtmxExceptionListenerFunctionalTest.php
+++ b/tests/EventListener/HtmxExceptionListenerFunctionalTest.php
@@ -20,7 +20,7 @@ class HtmxExceptionListenerFunctionalTest extends WebTestCase
     {
         $client = self::createClient();
         $client->catchExceptions(true);
-        $client->request('GET', '/gibt-es-nicht', server: ['HTTP_HX-Request' => 'true']);
+        $client->request('GET', '/does-not-exist', server: ['HTTP_HX-Request' => 'true']);
 
         $response = $client->getResponse();
         self::assertSame(Response::HTTP_OK, $response->getStatusCode());
@@ -33,7 +33,7 @@ class HtmxExceptionListenerFunctionalTest extends WebTestCase
     {
         $client = self::createClient();
         $client->catchExceptions(true);
-        $client->request('GET', '/gibt-es-nicht');
+        $client->request('GET', '/does-not-exist');
 
         // Asserting on headers rather than body: in debug mode Symfony's exception page renders
         // the source of every stack frame, this file included, so any marker string searched for
diff --git a/tests/EventListener/HtmxExceptionListenerTest.php b/tests/EventListener/HtmxExceptionListenerTest.php
index e715e62..6e135cd 100644
--- a/tests/EventListener/HtmxExceptionListenerTest.php
+++ b/tests/EventListener/HtmxExceptionListenerTest.php
@@ -81,7 +81,7 @@ class HtmxExceptionListenerTest extends KernelTestCase
     {
         return new ExceptionEvent(
             self::bootKernel(),
-            Request::create('/buchungen', server: $server),
+            Request::create('/bookings', server: $server),
             HttpKernelInterface::MAIN_REQUEST,
             new \RuntimeException('boom'),
         );
diff --git a/tests/Htmx/HxTraitTest.php b/tests/Htmx/HxTraitTest.php
index 1ad152a..859c159 100644
--- a/tests/Htmx/HxTraitTest.php
+++ b/tests/Htmx/HxTraitTest.php
@@ -16,20 +16,20 @@ class HxTraitTest extends TestCase
 {
     public function testHtmxRequestsGetAnHxRedirectInsteadOfA302(): void
     {
-        $response = $this->controller()->redirectTo($this->request(['HTTP_HX-Request' => 'true']), '/buchungen');
+        $response = $this->controller()->redirectTo($this->request(['HTTP_HX-Request' => 'true']), '/bookings');
 
         self::assertInstanceOf(HxRedirectResponse::class, $response);
-        self::assertSame('/buchungen', $response->headers->get('HX-Redirect'));
+        self::assertSame('/bookings', $response->headers->get('HX-Redirect'));
         // A 3xx would be followed by the browser and swapped as a whole page into the fragment.
         self::assertSame(Response::HTTP_OK, $response->getStatusCode());
     }
 
     public function testOrdinaryRequestsGetANormalRedirect(): void
     {
-        $response = $this->controller()->redirectTo($this->request(), '/buchungen');
+        $response = $this->controller()->redirectTo($this->request(), '/bookings');
 
         self::assertInstanceOf(RedirectResponse::class, $response);
-        self::assertSame('/buchungen', $response->getTargetUrl());
+        self::assertSame('/bookings', $response->getTargetUrl());
     }
 
     public function testOobResponseConcatenatesEveryRequestedBlock(): void
@@ -69,8 +69,8 @@ class HxTraitTest extends TestCase
 
         self::assertFalse($controller->oob('t.html.twig', ['b'])->headers->has('HX-Push-Url'));
         self::assertSame(
-            '/buchungen?datum=2026-09-13',
-            $controller->oob('t.html.twig', ['b'], [], '/buchungen?datum=2026-09-13')->headers->get('HX-Push-Url'),
+            '/bookings?date=2026-09-13',
+            $controller->oob('t.html.twig', ['b'], [], '/bookings?date=2026-09-13')->headers->get('HX-Push-Url'),
         );
     }
 
@@ -79,7 +79,7 @@ class HxTraitTest extends TestCase
      */
     private function request(array $server = []): Request
     {
-        return Request::create('/buchungen', server: $server);
+        return Request::create('/bookings', server: $server);
     }
 
     private function controller(): object
diff --git a/tests/Security/EpClientTest.php b/tests/Security/EpClientTest.php
index 318b2be..2d7885c 100644
--- a/tests/Security/EpClientTest.php
+++ b/tests/Security/EpClientTest.php
@@ -56,7 +56,7 @@ class EpClientTest extends KernelTestCase
         $request->getSession()->set('oauth2state', 'abc');
 
         $this->expectException(AuthorizationRequestException::class);
-        $this->expectExceptionMessage('keinen Code');
+        $this->expectExceptionMessage('no authorization code');
 
         $this->client()->fetchAccessToken($request);
     }
@@ -71,7 +71,7 @@ class EpClientTest extends KernelTestCase
         $request->getSession()->set('oauth2state', 'expected');
 
         $this->expectException(AuthorizationRequestException::class);
-        $this->expectExceptionMessage('state-Parameter');
+        $this->expectExceptionMessage('state parameter does not match');
 
         $this->client()->fetchAccessToken($request);
     }