There are a number of myths attached to multilingual language acquisition.
As practitioners (key workers, nursery nurses, teachers, teaching assistants, etc), you may be asked about bi/multilingual language development.
The parents of the children you support as well as your colleagues may come to you with queries based on those myths.
The attached document summarises the agreed best practice to support children's language development when they are growing up exposed to 2 or more languages.
The Useful Websites page may also be useful to signpost parents and other professionals.