If the child doesn't speak Dutch, can the child go to this school and does the age matter?

We can't refuse any child but we are just taking a test to know which level of Dutch the child has and then we can see in which class we can put the child or even we can give the child a course of Dutch with our special teacher. It's possible that for example there's a 9 year old child in a classroom with younger people but there can only be 2 years of age difference.