$langcode is not passed to file_view() in media_wysiwyg_token_to_markup()

\media_wysiwyg_token_to_markup() receives $langcode but doesn't use it for the file_view() call. This was added in #2129273: Pass langcode to media_wysiwyg_token_to_markup resolving media alt attributes in interface and since it was even added to the legacy field_attach mode, I can only assume that was a simple oversight.

This is a problem because the field system builds and caches the safe_value already during file_load, for all languages. Without passing it along, they're all displayed in the same language. Or not at all, if you disable the language fallback.