Some facts about Byelorussian

The Byelorussian (Belarusian) Language is a language of the Republic of Belarus Population is 7,905,000 in Belarus, 98% of the population (1993 Johnstone). Population total all countries 10,200,000. 74% of the ethnic group from the former USSR speak it as mother tongue.

Also spoken in Azerbaijan, Canada, Estonia, Kazakhstan, Kyrgyzstan, Latvia, Lithuania, Moldova, Poland, Russia (Europe), Tajikistan, Turkmenistan, Ukraine, USA, Uzbekistan.
Alternate names BELARUSIAN, BELORUSSIAN, BIELORUSSIAN, WHITE RUSSIAN, WHITE RUTHENIAN, BYELORUSSIAN
Dialects NORTHEAST BELARUSAN (POLOTS, VITEB-MOGILEV), SOUTHWEST BELARUSAN (GRODNEN-BARANOVICH, SLUTSKO-MOZYR, SLUTSKA-MAZYRSKI), CENTRAL BELARUSIAN.
Classification Indo-European, Slavic, East.
Linguistically between Russian and Ukrainian, with transitional dialects to both. National language. Cyrillic script used.

Also spoken in Poland (230,000)

Belarus