Edit Serif supports up to 102 different languages such as Arabic, Spanish, English, Portuguese, Russian, French, Turkish, Italian, Polish, Ukrainian, Uzbek, Kurdish (Latin), Azerbaijani (Latin), Hungarian, Czech, Serbian (Cyrillic), Kazakh (Latin), Belarusian (Latin), Belarusian (Cyrillic), Finnish, Slovak, Latvian, Irish, Estonian, Basque, and Icelandic in Latin, Cyrillic, Arabic, and other scripts.
Please note that not all languages are available for all formats.