indigenous language

English Thesaurus

1. a language that originated in a specified place and was not brought to that place from elsewhere (noun.communication)

hypernym	:	language, linguistic communication,
definition	:	a systematic means of communicating by the use of sounds or conventional symbols (noun.communication)

hyponym	:	substrate, substratum,
definition	:	an indigenous language that contributes features to the language of an invading people who impose their language on the indigenous population (noun.communication)