Hi Vinit,

If parents don't know English then they could learn some English as in some schools for admission of children the parents should know English then only their child will get seat in that school or otherwise the child won't get admission in that school.

They don't have to do masters in english if they can understand and speak enlish a little bit then also its ok.

Hope this  will help,please feel free to ask if you have any further queries.

Thank You.