The Sop language has been labelled under several different names. Among the names are Usino, Usina, Sopu, and Igoi. The Ethnologue uses the name Sop for this language. Its Ethnologue code is URW. Usino is the name of one of the villages and the name used for the government station. The speakers of this language do not recognize the name Usino as a name for their language. They use Sop as the name for their language.
Where symbols appear in pairs the one to the left represents a voiceless consonant
t, and d represent dental/alveolar/post-alveolar consonants, while n is only alveolar