Language Support
Translated widget text is available in 34 of the languages supported by x.com. Languages supported by X for Websites widgets and buttons:pt-BR will use pt if Portuguese is available but a Brazilian regional localization is not.
United States English is the default if a page’s language code does not match any available translation.
Setting the language only affects the language of X elements such as action text and timestamp display; Tweet text is always displayed in its originally authored language.