i have an 8mth old at home, hub n i speak to him in english, where both side grandparents in mandarin & hokkien. Lately, hub's nephew who had attended childcare for a year only speak in english to everyone (including his china mum), and his english has a strong american slang while he cant even properly pronounce 1-10 in mandarin. Im thinking is it necessary for hub n myself to start switching to mandarin so that after attending childcare he will not just speak english? In my personal perspective it is more difficult to master Chinese than English thus im worried m