Son picked up swear word at Reception!

I'd ignore it with him as the novelty will wear off with no reaction. Just mention it to the teacher and then she can deal with it.

@Sarah what do I say to the teacher? Just that I heard him swear and he’s definitely picked it up from school? What do I expect her to do really?

Go along the lines of your comment. She could then have a a chat with the class. She can't do anything if she doesn't know. You might not be the first to say something.

Thanks for the advice. I did mention it to her and she said she will have a chat with the class and mention it to the other teachers in the year group