A common language linking various people groups or ethnicities, where the adopted language is not a native language of any of the speakers using it; lingua franca

e-learning for the purpose of learning to communicate in a different language

A local indigenous sign language in an area with a high incidence of congenital deafness.

plural of village sign language

plural of domain-specific language

plural of symbolic language

plural of object language

plural of link-language

plural of contact language

plural of daughter language