Almost 16 Month and Started Biting Himself When Annoyed

This isn't uncommon for children his age. he doesn't know how to get across his feelings. Teething could be involved but its likely he bites since he can't get out his feelings. I've known other kids who have done this too. My son didn't say his first word until 15 months so he had a lot of fits too. It's just something they overcome. To enhance his verbal skills, talk to him all the time about everything. Talk, talk, talk and he will follow at his own pace.

In addition to the other great comments, it's a phase, it will pass. If it's not one phase, it's another. LOL

And yes, my son did that too sometimes, but mainly when he was teething. We just gave him other things to chomp on.

Perhaps teach him sign language... we are a bi-lingual family too and both my kids are bi-lingual too, and I taught them sign language from babies.
My son, is slow to talk too, but that's fine.
Teaching sign language does ENHANCE speaking and helps. This is per our speech therapist.

All the best,
Susan

He is expressing the best he knows how to communicate. You can introduce more words with movements to model this with him. Sometimes, when we say, "No", they do not understand just the word.

Just like when your child has done something wonderful. He see's in his eyes, the faces of smiles; the wonderful tones; maybe some clapping and would hear the repetive words of, "Good Job, Henry", "Good Boy, Henry"."

When it is a behavior that it is not accepted. You may shake your head; put your finger in front of your face waving - no, no; and your tone would be normal; and would hear the repetive words of, "Henry, that's not nice."; "Henry, Come Here."

By getting used in the habit of getting his attention by his name, and having the words and body language is all positive communication that he will model by you. These will become habits and will be useful, as he also enters the world of preschool.

I also see that you have a 2yr old golden retriever. Much like giving commands and repetive training. They're both in development. Good luck!

At 16 months he's very much aware of what mom's reactions are. When my son was frustratied he would gag himself and throw up when he was crying. As long as I remained calm and took his hands away things got better. If you don't give him much reation he will notice "hey this hurts when I bite myself." I'ts hard not to beable to communicate. When he bites himself you get as upset as he already feels and that makes him feel better about it all.