Primary Schools (Zurich)

Hi there, I am thinking of moving to Zurich soon as my partner is from there. I have a 9 year old child and I would love to here some feedback from people who have experiences with enrolling an English speaking child in a swiss school. This is my main worry about moving as my child does not yet speak the language. I am aware that there are private English speaking schools but unfortunately I cannot afford to send him there. I would really like to hear from people who have similar concerns or from parents who have English speaking children in primary school.