diff --git a/app/Filament/Resources/Applications/Tables/ApplicationsTable.php b/app/Filament/Resources/Applications/Tables/ApplicationsTable.php
index 7299c21..74dddcb 100644
--- a/app/Filament/Resources/Applications/Tables/ApplicationsTable.php
+++ b/app/Filament/Resources/Applications/Tables/ApplicationsTable.php
@@ -6,6 +6,7 @@ namespace App\Filament\Resources\Applications\Tables;
 
 use App\Enums\ApplicationKind;
 use App\Enums\ApplicationStatus;
+use App\Filament\Support\TranslatedOptionLabel;
 use App\Models\Application;
 use Filament\Actions\Action;
 use Filament\Actions\ActionGroup;
@@ -93,6 +94,7 @@ class ApplicationsTable
                 SelectFilter::make('call')
                     ->label(__('panel.applications.fields.call'))
                     ->relationship('call', 'title->'.config('locales.default'))
+                    ->getOptionLabelFromRecordUsing(TranslatedOptionLabel::using('title'))
                     ->searchable()
                     ->preload(),
 
diff --git a/app/Filament/Resources/Calls/CallResource.php b/app/Filament/Resources/Calls/CallResource.php
index 00249ac..0abe7c1 100644
--- a/app/Filament/Resources/Calls/CallResource.php
+++ b/app/Filament/Resources/Calls/CallResource.php
@@ -12,6 +12,7 @@ use App\Filament\Resources\Calls\Pages\ListCalls;
 use App\Filament\Resources\Calls\RelationManagers\ApplicationsRelationManager;
 use App\Filament\Support\PreviewAction;
 use App\Filament\Support\TranslatableTabs;
+use App\Filament\Support\TranslatedOptionLabel;
 use App\Models\Call;
 use App\Rules\UniqueTranslatedSlug;
 use BackedEnum;
@@ -141,6 +142,7 @@ class CallResource extends Resource
                     Select::make('project_id')
                         ->label(__('panel.calls.fields.project'))
                         ->relationship('project', 'title->'.config('locales.default'))
+                        ->getOptionLabelFromRecordUsing(TranslatedOptionLabel::using('title'))
                         ->searchable()
                         ->preload()
                         ->helperText(__('panel.calls.fields.project_hint')),
diff --git a/app/Filament/Resources/Pages/Schemas/PageForm.php b/app/Filament/Resources/Pages/Schemas/PageForm.php
index 8eb56d4..d185143 100644
--- a/app/Filament/Resources/Pages/Schemas/PageForm.php
+++ b/app/Filament/Resources/Pages/Schemas/PageForm.php
@@ -7,6 +7,7 @@ namespace App\Filament\Resources\Pages\Schemas;
 use App\Enums\PageStatus;
 use App\Filament\Resources\Pages\PageResource;
 use App\Filament\Support\TranslatableTabs;
+use App\Filament\Support\TranslatedOptionLabel;
 use App\Models\Page;
 use App\Rules\UniqueTranslatedSlug;
 use App\Support\DuplicateTitles;
@@ -112,6 +113,7 @@ class PageForm
                     Select::make('category_id')
                         ->label(__('panel.pages.fields.category'))
                         ->relationship('category', 'name->'.config('locales.default'))
+                        ->getOptionLabelFromRecordUsing(TranslatedOptionLabel::using('name'))
                         ->searchable()
                         ->preload(),
 
diff --git a/app/Filament/Resources/Pages/Tables/PagesTable.php b/app/Filament/Resources/Pages/Tables/PagesTable.php
index 4d1c20a..f1ffe61 100644
--- a/app/Filament/Resources/Pages/Tables/PagesTable.php
+++ b/app/Filament/Resources/Pages/Tables/PagesTable.php
@@ -8,6 +8,7 @@ use App\Enums\PageStatus;
 use App\Filament\Support\PreviewAction;
 use App\Filament\Support\ReviewActions;
 use App\Filament\Support\ReviewStatusColumn;
+use App\Filament\Support\TranslatedOptionLabel;
 use App\Filament\Support\TranslationStatusColumn;
 use App\Filament\Support\ViewsColumn;
 use App\Models\Page;
@@ -127,6 +128,7 @@ class PagesTable
                 SelectFilter::make('category')
                     ->label(__('panel.pages.fields.category'))
                     ->relationship('category', 'name->'.config('locales.default'))
+                    ->getOptionLabelFromRecordUsing(TranslatedOptionLabel::using('name'))
                     ->searchable()
                     ->preload(),
 
diff --git a/app/Filament/Resources/Repositories/RepositoryResource.php b/app/Filament/Resources/Repositories/RepositoryResource.php
index aabf03e..d548b78 100644
--- a/app/Filament/Resources/Repositories/RepositoryResource.php
+++ b/app/Filament/Resources/Repositories/RepositoryResource.php
@@ -9,6 +9,7 @@ use App\Filament\Resources\Repositories\Pages\CreateRepository;
 use App\Filament\Resources\Repositories\Pages\EditRepository;
 use App\Filament\Resources\Repositories\Pages\ListRepositories;
 use App\Filament\Resources\Repositories\Tables\RepositoriesTable;
+use App\Filament\Support\TranslatedOptionLabel;
 use App\Models\Repository;
 use BackedEnum;
 use Filament\Forms\Components\Select;
@@ -81,6 +82,7 @@ class RepositoryResource extends Resource
                     Select::make('project_id')
                         ->label(__('panel.repositories.fields.project'))
                         ->relationship('project', 'title->'.config('locales.default'))
+                        ->getOptionLabelFromRecordUsing(TranslatedOptionLabel::using('title'))
                         ->searchable()
                         ->preload(),
 
diff --git a/app/Filament/Resources/Talks/TalkResource.php b/app/Filament/Resources/Talks/TalkResource.php
index 1e93c12..17023b0 100644
--- a/app/Filament/Resources/Talks/TalkResource.php
+++ b/app/Filament/Resources/Talks/TalkResource.php
@@ -9,6 +9,7 @@ use App\Filament\Resources\Talks\Pages\CreateTalk;
 use App\Filament\Resources\Talks\Pages\EditTalk;
 use App\Filament\Resources\Talks\Pages\ListTalks;
 use App\Filament\Support\TranslatableTabs;
+use App\Filament\Support\TranslatedOptionLabel;
 use App\Models\Talk;
 use BackedEnum;
 use Filament\Actions\BulkActionGroup;
@@ -126,6 +127,7 @@ class TalkResource extends Resource
                     Select::make('project_id')
                         ->label(__('panel.talks.fields.project'))
                         ->relationship('project', 'title->'.config('locales.default'))
+                        ->getOptionLabelFromRecordUsing(TranslatedOptionLabel::using('title'))
                         ->searchable()
                         ->preload(),
 
diff --git a/app/Filament/Resources/Testimonials/TestimonialResource.php b/app/Filament/Resources/Testimonials/TestimonialResource.php
index 089bdf2..d9472da 100644
--- a/app/Filament/Resources/Testimonials/TestimonialResource.php
+++ b/app/Filament/Resources/Testimonials/TestimonialResource.php
@@ -9,6 +9,7 @@ use App\Filament\Resources\Testimonials\Pages\CreateTestimonial;
 use App\Filament\Resources\Testimonials\Pages\EditTestimonial;
 use App\Filament\Resources\Testimonials\Pages\ListTestimonials;
 use App\Filament\Support\TranslatableTabs;
+use App\Filament\Support\TranslatedOptionLabel;
 use App\Models\Testimonial;
 use BackedEnum;
 use Filament\Actions\BulkActionGroup;
@@ -137,12 +138,14 @@ class TestimonialResource extends Resource
                     Select::make('project_id')
                         ->label(__('panel.testimonials.fields.project'))
                         ->relationship('project', 'title->'.config('locales.default'))
+                        ->getOptionLabelFromRecordUsing(TranslatedOptionLabel::using('title'))
                         ->searchable()
                         ->preload(),
 
                     Select::make('service_id')
                         ->label(__('panel.testimonials.fields.service'))
                         ->relationship('service', 'title->'.config('locales.default'))
+                        ->getOptionLabelFromRecordUsing(TranslatedOptionLabel::using('title'))
                         ->searchable()
                         ->preload(),
 
diff --git a/app/Filament/Support/TranslatedOptionLabel.php b/app/Filament/Support/TranslatedOptionLabel.php
new file mode 100644
index 0000000..dbb1354
--- /dev/null
+++ b/app/Filament/Support/TranslatedOptionLabel.php
@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Filament\Support;
+
+use Closure;
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * The label of a relationship option whose title is translatable.
+ *
+ * `->relationship('category', 'name->es')` builds the list fine — that path
+ * goes through a query — but to validate a choice Filament reads the title
+ * back off the record as a property, `$record->{'name->es'}`, which does not
+ * exist. Every choice then came back without a label and was refused as "not
+ * in the list of allowed values", whichever one it was. Given this, Filament
+ * asks the record instead, in the language of whoever is using the panel.
+ *
+ * The JSON path stays in `relationship()`: it is still what the search box
+ * queries and the list is ordered by.
+ */
+final class TranslatedOptionLabel
+{
+    public static function using(string $attribute): Closure
+    {
+        return fn (Model $record): ?string => $record->getTranslation($attribute, app()->getLocale());
+    }
+}
diff --git a/tests/Feature/Panel/TranslatedRelationshipSelectsTest.php b/tests/Feature/Panel/TranslatedRelationshipSelectsTest.php
new file mode 100644
index 0000000..e842809
--- /dev/null
+++ b/tests/Feature/Panel/TranslatedRelationshipSelectsTest.php
@@ -0,0 +1,94 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Feature\Panel;
+
+use App\Filament\Resources\Calls\Pages\CreateCall;
+use App\Filament\Resources\Pages\Pages\CreatePage;
+use App\Filament\Resources\Repositories\Pages\CreateRepository;
+use App\Filament\Resources\Talks\Pages\CreateTalk;
+use App\Filament\Resources\Testimonials\Pages\CreateTestimonial;
+use App\Models\Category;
+use App\Models\Project;
+use App\Models\Service;
+use Database\Seeders\RolePermissionSeeder;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\Queue;
+use Livewire\Livewire;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\Attributes\Test;
+use Tests\FakesPireon;
+use Tests\TestCase;
+
+/**
+ * A select whose options are records with a translatable title — a page's
+ * category, the project a call belongs to — must accept the option picked.
+ *
+ * It did not: every choice was refused as "not in the list of allowed
+ * values", because Filament validated it by reading `name->es` off the record
+ * as a property. See App\Filament\Support\TranslatedOptionLabel.
+ */
+class TranslatedRelationshipSelectsTest extends TestCase
+{
+    use FakesPireon, RefreshDatabase;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->seed(RolePermissionSeeder::class);
+        Queue::fake();
+
+        $this->actingAs($this->userWithRoles('super_admin'));
+    }
+
+    /**
+     * @return array<string, array{0: class-string, 1: string, 2: string}>
+     */
+    public static function selects(): array
+    {
+        return [
+            "a page's category" => [CreatePage::class, 'category_id', Category::class],
+            "a call's project" => [CreateCall::class, 'project_id', Project::class],
+            "a testimonial's project" => [CreateTestimonial::class, 'project_id', Project::class],
+            "a testimonial's service" => [CreateTestimonial::class, 'service_id', Service::class],
+            "a talk's project" => [CreateTalk::class, 'project_id', Project::class],
+            "a repository's project" => [CreateRepository::class, 'project_id', Project::class],
+        ];
+    }
+
+    /**
+     * @param  class-string  $page
+     * @param  class-string<Model>  $model
+     */
+    #[Test]
+    #[DataProvider('selects')]
+    public function the_option_picked_is_accepted(string $page, string $field, string $model): void
+    {
+        $record = $model::factory()->create();
+
+        // Only this field is asserted: the rest of each form is left empty on
+        // purpose, and its own errors are not what this is about.
+        Livewire::test($page)
+            ->fillForm([$field => $record->getKey()])
+            ->call('create')
+            ->assertHasNoFormErrors([$field]);
+    }
+
+    #[Test]
+    public function the_option_reads_in_the_language_of_whoever_uses_the_panel(): void
+    {
+        $category = Category::factory()->create(['name' => ['es' => 'Novedades', 'en' => 'News']]);
+
+        app()->setLocale('en');
+
+        $select = collect(Livewire::test(CreatePage::class)->instance()->form->getFlatComponents())
+            ->first(fn ($component) => method_exists($component, 'getName') && $component->getName() === 'category_id');
+
+        $label = $select->getOptionLabelFromRecord($category);
+
+        $this->assertSame('News', $label);
+    }
+}