| Language | Genetic classification |
| Baltic | Balto-Slavic < Indo-European languages |
| Balto-Slavic | Indo-European languages |
| Belarusian (Byelo-Russian, White Russian) | East Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Bosnian | Serbo-Croatian (Serbian, Croatian, Bosnian) < South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Bulgarian | South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Bulgarian Sign Language | Individual sign languages (except ASL) < Sign languages |
| Burgenland Croatian | Serbo-Croatian (Serbian, Croatian, Bosnian) < South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Byelo-Russian see: Belarusian (Byelo-Russian, White Russian) | East Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Carinthian-Slovenian | Slovenian < South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Crnogorski see: Montenegrin | Serbo-Croatian (Serbian, Croatian, Bosnian) < South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Croatian | Serbo-Croatian (Serbian, Croatian, Bosnian) < South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Czech | West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| East Slavic | Slavic < Balto-Slavic < Indo-European languages |
| Kashubian | West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Knaanic | West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Latgalian | Latvian < Baltic < Balto-Slavic < Indo-European languages |
| Latvian | Baltic < Balto-Slavic < Indo-European languages |
| Lithuanian | Baltic < Balto-Slavic < Indo-European languages |
| Lower Sorbian | Sorbian < West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Macedonian | South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Middle Czech | Czech < West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Middle Polish | Polish < West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Modern Czech | Czech < West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Modern Polish | Polish < West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Modern Slovak | Slovak < West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Molise Slavic | Serbo-Croatian (Serbian, Croatian, Bosnian) < South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Montenegrin | Serbo-Croatian (Serbian, Croatian, Bosnian) < South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Našta | South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Novgorodian | Old Russian < East Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Old Czech | Czech < West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Old Polish | Polish < West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Old Prussian | Baltic < Balto-Slavic < Indo-European languages |
| Old Russian | East Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Old Slavic | South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Old Slovak | Slovak < West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Pannonian Slovenian | Slovenian < South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Polabian | West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Polish | West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Pomeranian | West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Prekmurje Slovenian | Pannonian Slovenian < Slovenian < South Slavic < Slavic < Balto-Slavic |
| Proto- and Common Slavic | Slavic < Balto-Slavic < Indo-European languages |
| Resian | Slovenian < South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Russian | East Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Rusyn | East Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Serbian | Serbo-Croatian (Serbian, Croatian, Bosnian) < South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Serbo-Croatian (Serbian, Croatian, Bosnian) | South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Silesian | Polish < West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Slavic | Balto-Slavic < Indo-European languages |
| Slovak | West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Slovenian | South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Sorb see: Sorbian | West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Sorbian | West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| South Slavic | Slavic < Balto-Slavic < Indo-European languages |
| Styrian | Slovenian < South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Torlak | South Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Ukrainian | East Slavic < Slavic < Balto-Slavic < Indo-European languages |
| Upper Sorbian | Sorbian < West Slavic < Slavic < Balto-Slavic < Indo-European languages |
| West Slavic | Slavic < Balto-Slavic < Indo-European languages |
| White Russian see: Belarusian (Byelo-Russian, White Russian) | East Slavic < Slavic < Balto-Slavic < Indo-European languages |
