There can be no valid reason for separating siblings nor for denying immigrant children the right to speak in their mother-tongue – as long as the same children are given every opportunity to become proficient in learning English as a second language. I speak as one who has long enjoyed the ‘music’ of other languages as a teacher of English to students from many countries.
The impersonality of the ‘care-system’ has long been criticised. Above all things, children need love as part of their nurturing. When their birth-parents fail to deliver either or both of these, the state steps in and the child/children suffer. This is the time that support for the family is most urgently needed in order to prevent the breakdown that will necessitate a schism in the family unit.
A complete overhaul of the system is a necessity. It is currently not fit for purpose. This will be costly in terms of money, but such investment in the children, our hope for the future, will surely reward the initial expense.