Languages written in a Cyrillic-derived alphabet

quotation from wiki:

Indo-European languages

• Indo-Iranian languages
  • Indo-Aryan languages
    • Romani (in Serbia, Montenegro, Macedonia, Bulgaria and former USSR)
  • Iranian languages
    • Kurdish (living in former USSR)
    • Ossetic (since 18th century, modern alphabet since 1938)
    • Shughni
    • Tajik
    • Tat (Judeo-Tat)
    • Yaghnobi

• Romance languages
  • Romanian (up to the 19th century, and a different form of Cyrillic in Moldova from 1940–89 exclusively; now Cyrillic is used in Transnistria officially and in the rest of the country in everyday communication by some groups of people; see Moldovan alphabet)
  • Ladino in occasional Bulgarian Sephardic publications.

• Slavic languages
  • Old Church Slavonic
  • Church Slavonic
  • Belarusian, now almost exclusively in Cyrillic, although there was a Roman version of the language in the Polish-Lithuanian Commonwealth. The Belarusian Roman script was called Łacinka
  • Bulgarian
  • Macedonian
  • Montenegrin
  • Russian
  • Rusyn
  • Serbian
  • Ukrainian

Languages of the Caucasus

(This group is not assumed to comprise genetically related subgroups.)

• Northeast Caucasian languages:
  • Avar
  • Chechen (since 1938, also with Roman 1991–2000)
  • Dargwa
  • Lak
  • Lezgian
  • Tabassaran
• Northwest Caucasian languages:
  • Abaza
  • Abkhaz
  • Adyghe
  • Kabardian

Sino-Tibetan languages

• Chinese languages
  • Dungan (since 1953)

Chukotko-Kamchatkan languages

• Chukchi (since 1936)
• Koryak (since 1936)
• Itelmen

Mongolian languages

• Buryat
• Kalmyk
• Mongolian

Tungusic languages

• Even
• Evenk (since 1937)
• Nanai
• Udihe (Udekhe) (writing recently is not used)

Turkic languages

• Altay
• Azerbaijani/Azeri (1939–91, exclusively in Cyrillic, since 1991 officially in Roman, but in reality in everyday communication Cyrillic is used alongside with Roman script)
• Balkar
• Bashkir
• Chuvash
• Crimean Tatar (1938–91)
• Gagauz (1957-1990s, exclusively in Cyrillic, since 1990s officially in Roman, but in reality in everyday communication Cyrillic is used alongside with Roman script)
• Kazakh
• Karachay
• Karakalpak (1940s–1990s)
• Karaim language (20-th century)
• Khakas
• Kumyk
• Kyrgyz
• Nogai
• Tatar (since 1939)
• Turkmen (1940–94 exclusively in Cyrillic, since 1994 officially in Roman, but in reality in everyday communication Cyrillic is used alongside with Roman script)
• Tuvan
• Uzbek (1941–98 exclusively in Cyrillic, since 1998 Cyrillic is used alongside with Roman script, which was prescribed as the "future" alphabet of Uzbek)
• Yakut

Uralic languages

• Samoyedic languages
  • Nenets (since 1937)
  • Selkup (since 1950s writing recently is not used)
• Uralic languages
  • Karelian (1940–1991)
  • Khanty
  • Mansi (since 1937 writing has not received distribution)
  • Komi
    • Komi-Zyrian (since 17th century, modern alphabet since 1930s)
    • Komi-Permyak
  • Mari (since 19th century)
  • Mordvin languages
    • Erzya (since 18th century)
    • Moksha (since 18th century)
  • Sami (in Russia, since 1980s)
    • Kildin Sami
  • Udmurt

Eskimo-Aleut languages

• Aleut
• Alutiiq
• Central Siberian Yupik (Yuit)

Afro-Asiatic languages

• Assyrian Neo-Aramaic (Aisor)

Other languages

• Ket
• Padonkaffsky jargon
• Nivkh
• Tlingit
• Yukaghir
• Russian sign language (uses the Cyrillic alphabet via the Russian Manual Alphabet)
• Constructed languages
  • International auxiliary languages
    • Lingua Franca Nova
    • Slovianski
  • Fictional languages
    • Brutopian (Donald Duck stories)
    • Syldavian (The Adventures of Tintin)