I've been trying to raise our DC bilingual. DS's first language is English, his second language is my mother tongue. We speak English when his dad is around as he doesn't speak my language, but when it is just the two of us I always speak in my native language. He understands me perfectly fine but always responds to me in English. There's the odd non English word thrown in and he is getting better, but never a full sentence.
We read in his second language, watch films, listen to audio stories. He also goes and visits my family 2-3 times a year and Skypes my mum (her speaking my native language, him responding on English).
Any advice on how to encourage him to speak to me in his non - native language? My mum says I should just make him but he point blank refuses.
He's 4 and also has a baby sister who doesn't talk yet.