diff --git a/src/Translator/src/TranslationsDumper.php b/src/Translator/src/TranslationsDumper.php
index 4e8bdd33582..9147da5c781 100644
--- a/src/Translator/src/TranslationsDumper.php
+++ b/src/Translator/src/TranslationsDumper.php
@@ -53,7 +53,7 @@ public function dump(MessageCatalogueInterface ...$catalogues): void
         $translationsTs = "import { Message, NoParametersType } from '@symfony/ux-translator';\n\n";
 
         foreach ($this->getTranslations(...$catalogues) as $translationId => $translationsByDomainAndLocale) {
-            $constantName = s($translationId)->ascii()->snake()->upper()->toString();
+            $constantName = $this->generateConstantName($translationId);
 
             $translationsJs .= sprintf(
                 "export const %s = %s;\n",
@@ -159,4 +159,19 @@ private function getLocaleFallbacks(MessageCatalogueInterface ...$catalogues): a
 
         return $localesFallbacks;
     }
+
+    private function generateConstantName(string $translationId): string
+    {
+        static $alreadyGenerated = [];
+
+        $prefix = 0;
+        do {
+            $constantName = s($translationId)->ascii()->snake()->upper()->toString().($prefix > 0 ? '_'.$prefix : '');
+            ++$prefix;
+        } while (\in_array($constantName, $alreadyGenerated, true));
+
+        $alreadyGenerated[] = $constantName;
+
+        return $constantName;
+    }
 }
diff --git a/src/Translator/tests/TranslationsDumperTest.php b/src/Translator/tests/TranslationsDumperTest.php
index a3cd9bf2139..8bfdaae4f20 100644
--- a/src/Translator/tests/TranslationsDumperTest.php
+++ b/src/Translator/tests/TranslationsDumperTest.php
@@ -40,10 +40,13 @@ public function testDump(): void
                     'notification.comment_created' => 'Your post received a comment!',
                     'notification.comment_created.description' => 'Your post "{title}" has received a new comment. You can read the comment by following <a href="{link}">this link</a>',
                     'post.num_comments' => '{count, plural, one {# comment} other {# comments}}',
+                    'post.num_comments.' => '{count, plural, one {# comment} other {# comments}} (should not conflict with the previous one.)',
                 ],
                 'messages' => [
                     'symfony.great' => 'Symfony is awesome!',
                     'symfony.what' => 'Symfony is %what%!',
+                    'symfony.what!' => 'Symfony is %what%! (should not conflict with the previous one.)',
+                    'symfony.what.' => 'Symfony is %what%. (should also not conflict with the previous one.)',
                     'apples.count.0' => 'There is 1 apple|There are %count% apples',
                     'apples.count.1' => '{1} There is one apple|]1,Inf] There are %count% apples',
                     'apples.count.2' => '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples',
@@ -53,6 +56,8 @@ public function testDump(): void
                     'what.count.2' => '{0} There are no %what%|{1} There is one %what%|]1,Inf] There are %count% %what%',
                     'what.count.3' => 'one: There is one %what%|more: There are %count% %what%',
                     'what.count.4' => 'one: There is one %what%|more: There are more than one %what%',
+                    'animal.dog-cat' => 'Dog and cat',
+                    'animal.dog_cat' => 'Dog and cat (should not conflict with the previous one)',
                 ],
                 'foobar' => [
                     'post.num_comments' => 'There is 1 comment|There are %count% comments',
@@ -63,10 +68,13 @@ public function testDump(): void
                     'notification.comment_created' => 'Votre article a reçu un commentaire !',
                     'notification.comment_created.description' => 'Votre article "{title}" a reçu un nouveau commentaire. Vous pouvez lire le commentaire en suivant <a href="{link}">ce lien</a>',
                     'post.num_comments' => '{count, plural, one {# commentaire} other {# commentaires}}',
+                    'post.num_comments.' => '{count, plural, one {# commentaire} other {# commentaires}} (ne doit pas rentrer en conflit avec la traduction précédente)',
                 ],
                 'messages' => [
                     'symfony.great' => 'Symfony est génial !',
                     'symfony.what' => 'Symfony est %what%!',
+                    'symfony.what!' => 'Symfony est %what%! (ne doit pas rentrer en conflit avec la traduction précédente)',
+                    'symfony.what.' => 'Symfony est %what%. (ne doit pas non plus rentrer en conflit avec la traduction précédente)',
                     'apples.count.0' => 'Il y a 1 pomme|Il y a %count% pommes',
                     'apples.count.1' => '{1} Il y a une pomme|]1,Inf] Il y a %count% pommes',
                     'apples.count.2' => '{0} Il n\'y a pas de pommes|{1} Il y a une pomme|]1,Inf] Il y a %count% pommes',
@@ -76,6 +84,8 @@ public function testDump(): void
                     'what.count.2' => '{0} Il n\'y a pas de %what%|{1} Il y a une %what%|]1,Inf] Il y a %count% %what%',
                     'what.count.3' => 'one: Il y a une %what%|more: Il y a %count% %what%',
                     'what.count.4' => 'one: Il y a une %what%|more: Il y a more than one %what%',
+                    'animal.dog-cat' => 'Chien et chat',
+                    'animal.dog_cat' => 'Chien et chat (ne doit pas rentrer en conflit avec la traduction précédente)',
                 ],
                 'foobar' => [
                     'post.num_comments' => 'Il y a 1 comment|Il y a %count% comments',
@@ -90,8 +100,11 @@ public function testDump(): void
 export const NOTIFICATION_COMMENT_CREATED = {"id":"notification.comment_created","translations":{"messages+intl-icu":{"en":"Your post received a comment!","fr":"Votre article a re\u00e7u un commentaire !"}}};
 export const NOTIFICATION_COMMENT_CREATED_DESCRIPTION = {"id":"notification.comment_created.description","translations":{"messages+intl-icu":{"en":"Your post \"{title}\" has received a new comment. You can read the comment by following <a href=\"{link}\">this link<\/a>","fr":"Votre article \"{title}\" a re\u00e7u un nouveau commentaire. Vous pouvez lire le commentaire en suivant <a href=\"{link}\">ce lien<\/a>"}}};
 export const POST_NUM_COMMENTS = {"id":"post.num_comments","translations":{"messages+intl-icu":{"en":"{count, plural, one {# comment} other {# comments}}","fr":"{count, plural, one {# commentaire} other {# commentaires}}"},"foobar":{"en":"There is 1 comment|There are %count% comments","fr":"Il y a 1 comment|Il y a %count% comments"}}};
+export const POST_NUM_COMMENTS_1 = {"id":"post.num_comments.","translations":{"messages+intl-icu":{"en":"{count, plural, one {# comment} other {# comments}} (should not conflict with the previous one.)","fr":"{count, plural, one {# commentaire} other {# commentaires}} (ne doit pas rentrer en conflit avec la traduction pr\u00e9c\u00e9dente)"}}};
 export const SYMFONY_GREAT = {"id":"symfony.great","translations":{"messages":{"en":"Symfony is awesome!","fr":"Symfony est g\u00e9nial !"}}};
 export const SYMFONY_WHAT = {"id":"symfony.what","translations":{"messages":{"en":"Symfony is %what%!","fr":"Symfony est %what%!"}}};
+export const SYMFONY_WHAT_1 = {"id":"symfony.what!","translations":{"messages":{"en":"Symfony is %what%! (should not conflict with the previous one.)","fr":"Symfony est %what%! (ne doit pas rentrer en conflit avec la traduction pr\u00e9c\u00e9dente)"}}};
+export const SYMFONY_WHAT_2 = {"id":"symfony.what.","translations":{"messages":{"en":"Symfony is %what%. (should also not conflict with the previous one.)","fr":"Symfony est %what%. (ne doit pas non plus rentrer en conflit avec la traduction pr\u00e9c\u00e9dente)"}}};
 export const APPLES_COUNT0 = {"id":"apples.count.0","translations":{"messages":{"en":"There is 1 apple|There are %count% apples","fr":"Il y a 1 pomme|Il y a %count% pommes"}}};
 export const APPLES_COUNT1 = {"id":"apples.count.1","translations":{"messages":{"en":"{1} There is one apple|]1,Inf] There are %count% apples","fr":"{1} Il y a une pomme|]1,Inf] Il y a %count% pommes"}}};
 export const APPLES_COUNT2 = {"id":"apples.count.2","translations":{"messages":{"en":"{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples","fr":"{0} Il n'y a pas de pommes|{1} Il y a une pomme|]1,Inf] Il y a %count% pommes"}}};
@@ -101,6 +114,8 @@ public function testDump(): void
 export const WHAT_COUNT2 = {"id":"what.count.2","translations":{"messages":{"en":"{0} There are no %what%|{1} There is one %what%|]1,Inf] There are %count% %what%","fr":"{0} Il n'y a pas de %what%|{1} Il y a une %what%|]1,Inf] Il y a %count% %what%"}}};
 export const WHAT_COUNT3 = {"id":"what.count.3","translations":{"messages":{"en":"one: There is one %what%|more: There are %count% %what%","fr":"one: Il y a une %what%|more: Il y a %count% %what%"}}};
 export const WHAT_COUNT4 = {"id":"what.count.4","translations":{"messages":{"en":"one: There is one %what%|more: There are more than one %what%","fr":"one: Il y a une %what%|more: Il y a more than one %what%"}}};
+export const ANIMAL_DOG_CAT = {"id":"animal.dog-cat","translations":{"messages":{"en":"Dog and cat","fr":"Chien et chat"}}};
+export const ANIMAL_DOG_CAT_1 = {"id":"animal.dog_cat","translations":{"messages":{"en":"Dog and cat (should not conflict with the previous one)","fr":"Chien et chat (ne doit pas rentrer en conflit avec la traduction pr\u00e9c\u00e9dente)"}}};
 
 JAVASCRIPT);
 
@@ -110,8 +125,11 @@ public function testDump(): void
 export declare const NOTIFICATION_COMMENT_CREATED: Message<{ 'messages+intl-icu': { parameters: NoParametersType } }, 'en'|'fr'>;
 export declare const NOTIFICATION_COMMENT_CREATED_DESCRIPTION: Message<{ 'messages+intl-icu': { parameters: { 'title': string, 'link': string } } }, 'en'|'fr'>;
 export declare const POST_NUM_COMMENTS: Message<{ 'messages+intl-icu': { parameters: { 'count': number } }, 'foobar': { parameters: { '%count%': number } } }, 'en'|'fr'>;
+export declare const POST_NUM_COMMENTS_1: Message<{ 'messages+intl-icu': { parameters: { 'count': number } } }, 'en'|'fr'>;
 export declare const SYMFONY_GREAT: Message<{ 'messages': { parameters: NoParametersType } }, 'en'|'fr'>;
 export declare const SYMFONY_WHAT: Message<{ 'messages': { parameters: { '%what%': string } } }, 'en'|'fr'>;
+export declare const SYMFONY_WHAT_1: Message<{ 'messages': { parameters: { '%what%': string } } }, 'en'|'fr'>;
+export declare const SYMFONY_WHAT_2: Message<{ 'messages': { parameters: { '%what%': string } } }, 'en'|'fr'>;
 export declare const APPLES_COUNT0: Message<{ 'messages': { parameters: { '%count%': number } } }, 'en'|'fr'>;
 export declare const APPLES_COUNT1: Message<{ 'messages': { parameters: { '%count%': number } } }, 'en'|'fr'>;
 export declare const APPLES_COUNT2: Message<{ 'messages': { parameters: { '%count%': number } } }, 'en'|'fr'>;
@@ -121,6 +139,8 @@ public function testDump(): void
 export declare const WHAT_COUNT2: Message<{ 'messages': { parameters: { '%what%': string, '%count%': number } } }, 'en'|'fr'>;
 export declare const WHAT_COUNT3: Message<{ 'messages': { parameters: { '%what%': string, '%count%': number } } }, 'en'|'fr'>;
 export declare const WHAT_COUNT4: Message<{ 'messages': { parameters: { '%what%': string } } }, 'en'|'fr'>;
+export declare const ANIMAL_DOG_CAT: Message<{ 'messages': { parameters: NoParametersType } }, 'en'|'fr'>;
+export declare const ANIMAL_DOG_CAT_1: Message<{ 'messages': { parameters: NoParametersType } }, 'en'|'fr'>;
 
 TYPESCRIPT);
     }