Hello,
Translate theme https://xstore.helpscoutdocs.com/article/30-base-theme-translation If you already have theme translation files in the correct folder make sure that files are synchronized with your version of pot file https://xstore.helpscoutdocs.com/article/103-translation-files-update
If it still does not work for you, provide FTP and Dashabord access to site, we’ll check.
Regards
