diff --git a/apps/builder/next.config.mjs b/apps/builder/next.config.mjs
index f842162b3..ee4f93d78 100644
--- a/apps/builder/next.config.mjs
+++ b/apps/builder/next.config.mjs
@@ -22,7 +22,7 @@ const nextConfig = {
   ],
   i18n: {
     defaultLocale: 'en',
-    locales: ['en', 'fr', 'pt', 'pt_BR', 'de'],
+    locales: ['en', 'fr', 'pt', 'pt-BR', 'de'],
   },
   experimental: {
     outputFileTracingRoot: join(__dirname, '../../'),
diff --git a/apps/builder/src/features/account/components/UserPreferencesForm.tsx b/apps/builder/src/features/account/components/UserPreferencesForm.tsx
index 12d3e833a..7a5a2ded5 100644
--- a/apps/builder/src/features/account/components/UserPreferencesForm.tsx
+++ b/apps/builder/src/features/account/components/UserPreferencesForm.tsx
@@ -19,11 +19,11 @@ import { ChevronDownIcon } from '@/components/icons'
 import { MoreInfoTooltip } from '@/components/MoreInfoTooltip'
 
 const localeHumanReadable = {
-  en:    'English',
-  fr:    'Français',
-  de:    'Deutsch',
-  pt:    'Português',
-  pt_BR: 'Português (BR)'
+  en: 'English',
+  fr: 'Français',
+  de: 'Deutsch',
+  pt: 'Português',
+  'pt-BR': 'Português (BR)',
 } as const
 
 export const UserPreferencesForm = () => {
diff --git a/apps/builder/src/locales/index.ts b/apps/builder/src/locales/index.ts
index 8a0b5c19d..13bbea317 100644
--- a/apps/builder/src/locales/index.ts
+++ b/apps/builder/src/locales/index.ts
@@ -1,6 +1,6 @@
 import { createI18n } from 'next-international'
 
-export type I18nFunction = (key: string) => string;
+export type I18nFunction = (key: string) => string
 
 export const {
   useI18n,
@@ -11,9 +11,9 @@ export const {
   useChangeLocale,
   defineLocale,
 } = createI18n({
-  en:    () => import('./en'),
-  fr:    () => import('./fr'),
-  pt:    () => import('./pt'),
-  pt_BR: () => import('./pt_BR'),
-  de:    () => import('./de'),
-})
\ No newline at end of file
+  en: () => import('./en'),
+  fr: () => import('./fr'),
+  pt: () => import('./pt'),
+  'pt-BR': () => import('./pt-BR'),
+  de: () => import('./de'),
+})
diff --git a/apps/builder/src/locales/pt_BR.ts b/apps/builder/src/locales/pt-BR.ts
similarity index 100%
rename from apps/builder/src/locales/pt_BR.ts
rename to apps/builder/src/locales/pt-BR.ts