My DS is 20 months old and has yet to say his first word, and it's starting to worry me a bit! We're bringing him up bilingually with English and German (one parent - one language), and he goes to an English-speaking nursery in the mornings. His understanding is quite good (at least in German), he babbles a lot and communicates well with gestures and grunts. He's due to have a hearing test in a few days' time, but I'm pretty sure his hearing is fine.
Does anyone have experience with speech delay in bilingual children?