For Font Subsets. Go to Appearance > Customizer > Typography > Font Subsets.
Google font families support every subset. In our theme, you’ll get subsets like Latin, Latin-ext, Cyrillic, Cyrillic-ext, Greek, Greek-ext, Vietnamese and Arabic. If you are using any particular language first enable the font subset. Without these special characters won’t be displayed at your site. Just check the desired subset and enable it on your site.
Still feel any difficulty, Visit to our Support forum.