Parents of children with additional or special needs often want guidance on whether their children can become bilingual, or remain bilingual, despite the challenges they have. They often consult professionals such as doctors, psychologists, speech and language pathologists, educators, and so on and many come away with words of warning. Bilingualism might have consequences on the development of their child they are told erroneously: it may delay the acquisition of the majority language, cause a burden for the child, create language confusion, and so on. And sometimes, they are encouraged to concentrate on just one language, the majority language, and give up the minority or home language. One can only be extremely concerned by this kind of feedback and over the years I have prepared posts on the topic, very often with the help of specialists. They are the object of this chapter.