Skyrim hosts a variety of races, each speaking their own unique language.  Each race is taught certain languages as a youth and will expand upon that list as they grow up.

For convenience, racial languages have been assigned a colour to indicate when they are being used.  Consult the list below to note which language uses which colour (orange is reserved for OOC):

Altmeris (Purple)
Bosmer (Green)
Breton (Seagreen)
Dunmer (Gray)
Imperial (Cyrodiilic, Royalred)
Jel (Argonian, Aqua)
Orcish (Brown)
Nord (Blue)
Yoku (Redguard, Goldenrod)
Ta'agra (Kajiit, Coral)