All platforms support Latin, Cyrillic or Greek characters.

Windows:

34 Main Languages for which FineReader Engine provides dictionary support and spelling check system: Armenian (Eastern, Western, Grabar), Bulgarian, Catalan, Croatian, Czech, Danish, Dutch (The Netherlands and Belgium), English, Estonian, Finnish, French, German (new and old spelling), Greek, Hungarian, Italian, Latvian, Lithuanian, Norwegian (Nynorsk and Bokmål), Polish, Portuguese (Portugal and Brazil), Romanian, Russian, Slovak, Spanish, Swedish, Tatar, Turkish and Ukrainian.

Additional Languages with Latin, Cyrillic or Greek characters: Abkhaz, Adyghian, Afrikaans, Agul, Albanian, Altai, Avar, Aymara, Azerbaijani (Cyrillic), Azerbaijani (Latin), Bashkir, Basque, Belarusian, Bemba, Blackfoot, Breton, Bugotu, Buryat, Cebuano, Chamorro, Chechen, Chukchee, Chuvash, Congo, Corsican, Crimean Tatar, Crow, Dakota, Dargwa, Dungan, Eskimo (Cyrillic), Eskimo (Latin), Even, Evenki, Faeroese, Fijian, Frisian, Friulian, Gagauz, Galician, Ganda, German (Luxemburg), Guarani, Hani, Hausa, Hawaiian, Icelandic, Indonesian, Ingush, Irish, Jingpo, Kabardian, Kalmyk, Karachay-balkar, Karakalpak, Kasub, Kawa, Kazakh, Khakass, Khanty, Kikuyu, Kirghiz, Koryak, Kpelle, Kumyk, Kurdish, Lak, Latin, Lezgi, Luba, Macedonian, Malagasy, Malay, Malinke, Maltese, Mansy, Maori, Mari, Maya, Miao, Minangkabau, Mohawk, Moldavian, Mongol, Mordvin, Nahuatl, Nenets, Nivkh, Nogay, Nyanja, Ojibway, Ossetian, Papiamento, Provencal, Quechua, Rhaeto-Romanic, Romany, Rundi, Russian (old spelling), Rwanda, Sami (Lappish), Samoan, Scottish Gaelic, Selkup, Serbian (Cyrillic), Serbian (Latin), Shona, Slovenian, Somali, Sorbian, Sotho, Sunda, Swahili, Swazi, Tabasaran, Tagalog, Tahitian, Tajik, Tok Pisin, Tongan, Tswana, Tun, Turkmen, Tuvinian, Udmurt, Uzbek (Cyrillic), Uzbek (Latin), Welsh, Wolof, Xhosa, Yakut, Zapotec, Zulu.

MAC OSX:

28 Languages: Bulgarian, Croatian, Czech, Danish, Dutch (The Netherlands and Belgium), English, Estonian, Finnish, French, German (new and old spelling), Greek, Hungarian, Icelandic, Italian, Latvian, Lithuanian, Norwegian (Nynorsk and Bokmål), Polish, Portuguese (Portugal and Brazil), Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swedish, Turkish and Ukrainian.

Android:

23 Languages: Bulgarian, Czech, Danish, Dutch (The Netherlands and Belgium), English, Estonian, Finnish, French, German (new and old spelling), Greek, Indonesian, Italian, Norwegian (Nynorsk and Bokmål), Polish, Portuguese (Portugal and Brazil), Russian, Spanish, Swedish, Turkish, Ukrainian, Chinese (simplified and traditional), Japanese, Korean (with and without support for Chinese symbols).