Definitely. My partner's home country is basically in this situation after the british were done with it. To the point where my partner comes from a family that only spoke english at home (or rather a mix, like you say, but it definitely leans heavily english). They now find it extremely difficult to learn the language of their diaspora later in life due to dyslexia, as well as social stigma of not knowing it and others not seeing them as >ethnicity< enough.