| Demographic Table for Eastern European LCTLs | ||||
| Name of Language | Country | Mother Tongue (L1) Speakers | Most Recent Year of Cited Data | Current Usage & Socio-cultural Importance |
| ALBANIAN | ALBANIA | 3.2M | 1989 | |
| YUGOSLAVIA | 1.5M | 1992 | ||
| MACEDONIA | 242,250 | 1992 | ||
| AVAR | RUSSIA | 556,000 | 1989 | |
| AZERBAIJAN | 44,000 | 1992 | ||
| BASHKIR | RUSSIA | 901,150 | 1993 | |
| BELARUSIAN | BELARUS | 7.9M | 1993 | |
| POLAND | 230,000 | 1993 | ||
| BULGARIAN | BULGARIA | 8M | 1986 | |
| MOLDOVA | 361,000 | 1979 | ||
| ROMANIA | 10,439 | 1966 | ||
| TURKEY | 270,000 | 1993 | ||
| GREECE | 30,000 | 1998 | ||
| CHECHEN | RUSSIA | 9.9M | 1989 | |
| CHUVASH | RUSSIA | 1.77M | 1993 | |
| CRIMEAN TURKISH | ROMANIA | 25,000 | 1982 | |
| BULGARIA | 6,000 | 1990 | ||
| UZBEKISTAN | 189,000 | 1993 | ||
| CZECH | CZECH REPUBLIC | 10M | 1990 | |
| ESTONIAN | FINLAND | 6,000 | 1993 | |
| ESTONIA | 953,000 | 1989 | ||
| FINNISH | FINLAND | 4.7M | 1993 | |
| RUSSIA | 31,570 | 1979 | ||
| SWEDEN | 200,000 | 1997 | ||
| GAGAUZ | MOLDOVA | 173,000 | 1979 | |
| BULGARIA | 12,000 | 1982 | ||
| HUNGARIAN | ROMANIA | 2.5M | 1998 | |
| UKRAINE | 187,000 | 1993 | ||
| YUGOSLAVIA | 450,500 | 1986 | ||
| HUNGARY | 10.3M | 1995 | ||
| SLOVAKIA | 597,400 | 1993 | ||
| SLOVENIA | 9,240 | 1991 | ||
| KABARDIAN | RUSSIA | 443,000 | 1993 | |
| TURKEY | 202,000 | 1993 | ||
| LATVIAN | LATVIA | 1.4M | 1995 | |
| LADINO | TURKEY | 8,000 | 1976 | |
| LITHUANIAN | LITHUANIA | 2.99M | 1998 | |
| MACEDONIAN | MACEDONIA | 1.4M | 1986 | |
| ALBANIA | 30,000 | 1993 | ||
| GREECE (as "Slavic") | 41,017 | 1951 | ||
| MARI | RUSSIA | 593,000 | 1993 | |
| POLISH | POLAND | 36.5M | 1986 | |
| CZECH REPUBLIC | 50,000 | no date | ||
| ROMANIA | 10,000 | no date | ||
| ROMANIAN | MOLDOVA | 2.66M | 1979 | |
| ROMANIA | 20.5M | 1986 | ||
| UKRAINE | 250,000 | 1999 | ||
| YUGOSLAVIA | 250,000 | 1995 | ||
| ALBANIA | 50,000 | 1995 | ||
| CZECH REPUBLIC | 220,000 | 1980 | ||
| HUNGARY | 100,000 | 1995 | ||
| ROMANI | FINLAND | 40,000 | 1980 | |
| HUNGARY | 160,000 | 1995 | ||
| LATVIA | 8,000 | 1995 | ||
| POLAND | 35,000 | 1993 | ||
| RUSSIA | 10,000 | no date | ||
| MOLDOVA | 12,000 | 1993 | ||
| SLOVAKIA & CZECH REP | 220,000 | 1980 | ||
| YUGOSLAVIA | 151,000 | 1980 | ||
| ROMANIA | 200,000 | 1996 | ||
| RUSSIAN | ALL REPUBLICS OF THE FORMER USSR | 156.66M | 1999 | |
| SLOVAK | SLOVAKIA | 4.86M | 1990 | |
| HUNGARY | 10,000 | 1990 | ||
| YUGOSLAVIA | 80,000 | 1996 | ||
| SLAVONIC, OLD CHURCH | RUSSIA | liturgy | ||
| SLOVENIAN | SLOVENIA | 1.7M | 1991 | |
| AUSTRIA | 30,000 | 1993 | ||
| HUNGARY | 4,205 | 1970 | ||
| ITALY | 100,000 | 1987 | ||
| BOSNIAN, SERBIAN, SERBO-CROATIAN | BOSNIA-HERZEGOVINIA | 4M | 1995 | |
| ROMANIA | 80,000 | 1993 | ||
| YUGOSLAVIA | 10.2M | 1981 | ||
| CROATIA | 4.8M | 1995 | ||
| SWEDISH | FINLAND | 296,000 | 1997 | |
| TURKISH | BULGARIA | 845,500 | 1986 | |
| ROMANIA | 150,000 | 1993 | ||
| TURKEY | 46.3M | 1987 | ||
| YUGOSLAVIA & MACEDONIA | 250,000 | 1982 | ||
| UZBEKISTAN, TAJIKISTAN, KAZAKHSTAN & KYRGHYZSTAN | 197,000 | 1979 | ||
| TUVIN | RUSSIA | 206,000 | 1993 | |
| YIDDISH | LATVIA | 40,000 | 1991 | |
| UKRANIAN | POLAND | 1.5M | no date | |
| UKRAINE | 31M | 1993 | ||
| SLOVAKIA | 70,000 | no date | ||