Don't worry about it. I have a friend who grew up in a house speaking only Vietnamese, no English at all. She struggled for a few years but by about second grade she was able to speak English fluently. We graduated high school in 2001 so it was under a similar school system that you're dealing with now (not schools during the 1950s or anything).

I did some research as I was a modern languages minor in college and found it is normal for the English-as-second-language student to struggle initially but they catch up and show no (zero) problems when they are about 7 or 8.

I suspect the language difference is what is keeping the kids away. I know you've heard all the solutions like joining a club or or team to get him around the language so I wont sound like a broken record and repeat them.

It may be hard now, but the research shows that it will be fine in a few years.

I'm no expert but if all other areas of your child's development are ok I wouldn't worry too much. I would have a chat with the kindergarten teachers to see what they can suggest and do in his learning environment to help. Having plenty of play dates with some of his kindergarten pals as mentioned by someone earlier is a good idea. My child is 4 and speaks Welsh and French. Since we moved to USA she uses her English only at school and it has progressed very nicely and we keep our Welsh and French going at home. In the long term the ability to speak more than one language will be a huge asset to your child. Well done for doing such a great job.

Why is the nurse determining his language level and not a speech and language pathologist who is trained in this area?  A bilingual child develops their languages at a slower rate than a monolingual child for the first 7 years, but by 8 should be developmentally equal with their peers in both languages, if they do not have a language delay in their primary language.  I would talk with the school's speech and language pathologist about your child's language development.  Check the American Speech and Language Association for information on child language development.

There is no real concern, however, he should be speaking the language of instruction at school. In this way the teacher can better assess his abilities. You are doing a great job by keeping the home language.  Please speak to the teacher and ask her to group him with children who would encourage the language so that he can become fluent.