Hello. My 2 1/2 ds speaks but does not seem to be able to regularly use 2-3 words sentences. He only uses the key word of what he wants. We are a bilingual family: I speak my language, my dh speaks his, very consistently. My ds has a good vocabulary, understands both languages, and can even sing songs words for words in either. We read a lot, sing songs, watch a bit of tv. So I am baffled as to why he doesn't seem to be able to put words together even when we only ask him to repeat a sentence. Wondering at which stage we should stop worrying and start taking him to a speech therapist?