Basque
The Basque language of the northern Iberian Peninsula is a language isolate, and as such is not closely related to any other language.
Caucasian languages
Constructed languages
These languages were artificially created ("planned").Finno-Ugric languages
The Finno-Ugric languages are a subfamily of the Uralic language family.
Albanian
Armenian
Baltic languages
- Curonian
- Latvian
- Lithuanian
- Old Prussian
Celtic languages
Brythonic
Goidelic (Gaelic)
Germanic languages
North Germanic languages
West Germanic languages
East Germanic languages
Italic languages
Romance languages
The Romance languages decended from the Vulgar Latin spoken across most of the lands of the Roman Empire.Slavic languages
West Slavic languages
East Slavic languages
South Slavic languages
- Bulgarian
- Serbo-Croatian (sociolinguistically, 3 different languages):
not yet classified, lists very incomplete