Its not a problem at the age of your child. Mine spoke no english at all. And for this year I put my kids to a nursery who takes kids until the age of 5 so my big one has one more year to learn english, and its just great the way he can comunicate now and we had no stress. We have no chance to go to an english school (Dess, Parkhouse..) normaly Montessori should take them for sept this year, they take kids even if they dont speak perfect english.
So this is not an issue. The housing is something else....