[Translation] fix support of TranslatableInterface in IdentityTranslator

Author: VincentLanglet

Tests/Extension/Fixtures/StubTranslator.php

@@ -11,12 +11,19 @@
 
 namespace Symfony\Bridge\Twig\Tests\Extension\Fixtures;
 
+use Symfony\Contracts\Translation\TranslatableInterface;
 use Symfony\Contracts\Translation\TranslatorInterface;
 
 class StubTranslator implements TranslatorInterface
 {
     public function trans($id, array $parameters = [], $domain = null, $locale = null): string
     {
+        foreach ($parameters as $k => $v) {
+            if ($v instanceof TranslatableInterface) {
+                $parameters[$k] = $v->trans($this, $locale);
+            }
+        }
+
         return '[trans]'.strtr($id, $parameters).'[/trans]';
     }