Purple, I am here to help you! I totally understand where you are coming from! My DS is now 2.5 and only just starting to say a word other than mama, papa, or tractor. Seriously.
I was worried like you, I was labelling things like you, and I got nothing but blank/confused looks in return, like you.
I was told by all sorts of well-meaning people that "2 is early" "there's loads of time to catch up" "Einstein only spoke when he was 4," and "dual language children are delayed."
RUBBISH!
The fact is, it's incredibly difficult to parent a child of 2+ when they won't speak to you. And latest research shows that multi-language children are not delayed in speaking because of the presence of multiple languages. Speech developement is determined by the child's abilities in that regard, and one or 3 languages will not make a significant difference.
(My DS only started walking at 16 months btw. That too was frustrating! )
I suggest you read a bit about speech development and difficulties with it. Start with Hanen's It takes Two to Talk and look for a book by Debbie Feit. They give you very good ideas of what to do.
My DS saw a NHS speech therapist who was useless, inexperienced, and had no idea how to interpret understanding in a bilingual child.
However, we've had major success in the past 6 weeks (!) from another therapist we found, who is bilingual in both our languages (English&German). We found them by contacting a German doctor's practice in our area. It is private but not that expensive. She has been brilliant, spot-on.
Maybe some of this helps, gives you ideas, gives you a place to start.
IME, sitting on hands is not going to make you feel any better, it won't help you understand what's going on, and it won't help your child either.
Good luck