CLI OCR for Linux is based on ABBYY FineReader Engine for Linux, so it is able to recognize 190 OCR languages.

with Latin, Cyrillic, Greek, Hebrew and Armenian characters, for which ABBYY FineReader Engine 8.0 CLI for Linux provides dictionary support:
Armenian (Eastern, Western, Grabar), Bulgarian, Catalan, Croatian, Czech, Danish, Dutch (Netherlands and Belgium), English, Estonian, Finnish, French, German (new and old spelling), Greek, Hebrew, Hungarian, Italian, Latvian, Lithuanian, Norwegian (Nynorsk and Bokmal), Polish, Portuguese (Portugal and Brazil), Romanian, Russian, Slovak, Spanish, Swedish, Tatar, Turkish and Ukrainian.

with Latin, Cyrillic or Greek characters: Abkhaz, Adyghian, Afrikaans, Agul, Albanian, Altai, Avar, Aymara, Azerbaijani (Cyrillic), Azerbaijani (Latin), Basque, Belarusian, Bemba, Blackfoot, Breton, Bugotu, Buryat, Cebuano, Chamorro, Chechen, Chukchee, Chuvash, 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, Ingush, Irish, Jingpo, Kabardian, Kalmyk, Karachay-balkar, Karakalpak, Kasub, Kawa, Kazakh, Khakass, Khanty, Kikuyu, Kirghiz, Kongo, Koryak, Kpelle, Kumyk, Kurdish, Lak, Latin, Lezgi, Luba, Macedonian, Malagasy, Malay, Malinke, Maltese, Mansi, 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, Somali, Sorbian, Sotho, Sunda, Swahili, Swazi, Tabasaran, Tagalog, Tahitian, Tajik, Tok Pisin, Tongan, Tswana, Tun, Turkmen, Tuvinian, Udmurt, Uigur (Cyrillic), Uigur (Latin), Uzbek (Cyrillic), Uzbek (Latin), Welsh, Wolof, Xhosa, Yakut, Zapotec, Zulu.

Traditional Chinese, Simplified Chinese, Japanese and Korean have dictionary support. Important: These languages are not included in a default license, but available as Add-On

Esperanto, Interlingua, Ido and Occidental.

Basic, C/C++, COBOL, Fortran, JAVA and Pascal.