symfony
diff --git a/‎src/Symfony/Bundle/FrameworkBundle/Command/TranslationUpdateCommand.php‎
Lines changed: 3 additions & 0 deletions b/‎src/Symfony/Bundle/FrameworkBundle/Command/TranslationUpdateCommand.php‎
Lines changed: 3 additions & 0 deletions
diff --git a/‎src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationUpdateCommandCompletionTest.php‎
Lines changed: 2 additions & 0 deletions b/‎src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationUpdateCommandCompletionTest.php‎
Lines changed: 2 additions & 0 deletions
@@ -22,6 +22,7 @@
 use Symfony\Component\Console\Style\SymfonyStyle;
 use Symfony\Component\HttpKernel\Bundle\BundleInterface;
 use Symfony\Component\HttpKernel\KernelInterface;
+use Symfony\Component\Intl\Locales;
 use Symfony\Component\Translation\Catalogue\MergeOperation;
 use Symfony\Component\Translation\Catalogue\TargetOperation;
 use Symfony\Component\Translation\Extractor\ExtractorInterface;
@@ -310,6 +311,8 @@ protected function execute(InputInterface $input, OutputInterface $output): int
     public function complete(CompletionInput $input, CompletionSuggestions $suggestions): void
     {
         if ($input->mustSuggestArgumentValuesFor('locale')) {
+            $suggestions->suggestValues(Locales::getLocales());
+
             return;
         }
 
 
@@ -20,6 +20,7 @@
 use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Component\HttpKernel\Bundle\BundleInterface;
 use Symfony\Component\HttpKernel\KernelInterface;
+use Symfony\Component\Intl\Locales;
 use Symfony\Component\Translation\Extractor\ExtractorInterface;
 use Symfony\Component\Translation\Reader\TranslationReader;
 use Symfony\Component\Translation\Translator;
@@ -44,6 +45,7 @@ public function testComplete(array $input, array $expectedSuggestions)
 
     public function provideCompletionSuggestions()
     {
+        yield 'locale' => [[''], Locales::getLocales()];
         yield 'bundle' => [['en', ''], ['BaseBundle']];
         yield 'domain with locale' => [['en', '--domain=m'], ['messages']];
         yield 'domain without locale' => [['--domain=m'], []];