Transfer (languages in contact) ; Adstratum language; Adstratsprache; Interference ; Sprachentod; Extinct language; Language endangerment; Bedrohte Sprache; Linguicide; Linguizid; Language death ; Clinical linguistics ; Language variation/Dialectology ; Indigenism (American) ; Indianism ; Phonische Interferenz; Languages in contact (phon.) ; Sprachkontakt (phon.) ; Interference (phon.) ; Interference (synt.) ; Canada (English language in) ; Kanada (engl. Sprache in) ; English in Canada ; Montagnais; Innu-Aimûn; Naskapi ; Chipewyan; Tetsǫ́t'ıné; Tschippewayan