ethnic language
language spoken as the mother tongue of an ethnic group; does not include pidgins, dead languages or planned languages such as general conlangs, but does include creoles, revived languages, and according to some authorities national planned languages
en-US/ˈɛθnɪk ˈlæŋɡwɪd͡ʒ/
en-GB/ˈɛθnɪk ˈlæŋɡwɪd͡ʒ/