What we do:
Very strict OPOL
During the week the child is to 75% exposed to the German language. I talk German with him all day, we have German TV, he watches only a few programs in English. We have lots of German friends, go to two German playgroups and only have a few play dates with English speaking children.
We have lots German books etc.
However, he is two and does not talk at all. He just had surgery for his glue ears and we hope his hearing improves now.
Is there anything else I can do?