I wouldn't say most - perhaps "many". My anecdata: my wife has a large extended family and quite a few of her cousins and her cousins' kids struggle with Englis

I wouldn't say most - perhaps "many". My anecdata: my wife has a large extended family and quite a few of her cousins and her cousins' kids struggle with English, if they've bothered to learn it at all. It really is quite an insular society. (I've lived there twice, once as a child, then again for the first few years of my child's life; now live across the river in Ontario. Night and day, culturally.)