feat: llm support struct output (#17994)

Co-authored-by: twwu <twwu@dify.ai>
Co-authored-by: zxhlyh <jasonapring2015@outlook.com>

web/i18n/language.ts

@@ -33,7 +33,7 @@ export const languages = data.languages
 export const LanguagesSupported = languages.filter(item => item.supported).map(item => item.value)
 
 export const getLanguage = (locale: string) => {
-  if (locale === 'zh-Hans')
+  if (['zh-Hans', 'ja-JP'].includes(locale))
     return locale.replace('-', '_')
 
   return LanguagesSupported[0].replace('-', '_')