diff --git a/backend/src/graphql/resolver/UserResolver.ts b/backend/src/graphql/resolver/UserResolver.ts
index a89a8cb0b..47aefe12d 100644
--- a/backend/src/graphql/resolver/UserResolver.ts
+++ b/backend/src/graphql/resolver/UserResolver.ts
@@ -43,7 +43,7 @@ const isPassword = (password: string): boolean => {
   return !!password.match(/^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[^a-zA-Z0-9 \\t\\n\\r]).{8,}$/)
 }
 
-const LANGUAGES = ['de', 'en']
+const LANGUAGES = ['de', 'en', 'es']
 const DEFAULT_LANGUAGE = 'de'
 const isLanguage = (language: string): boolean => {
   return LANGUAGES.includes(language)