<a href="https://app.roll20.net/forum/post/11002727/language-specific-styling/?pageforid=11002727#post-11002727" rel="nofollow">https://app.roll20.net/forum/post/11002727/language-specific-styling/?pageforid=11002727#post-11002727</a> translation.json: { "LanguageCode" : "ru" , //the one you need ... } HTML: < script type = "text/worker" > on ( 'sheet:opened' , function () { $20 ( '.charsheet.lang-undefined' ). addClass ( `lang- ${ getTranslationByKey ( "LanguageCode" ) } ` ) }); ... </ script > CSS: Styles for ".charsheet.lang-[ 2 char language code ]" that you need.