Occasionally, babies keep their thoughts to themselves for a LONG time, perhaps for years. Perhaps they invent their own secret language, too. Perhaps you know the parents of one of these circumspect children.
Encourage parents of late talkers not to wait, regardless of what happened with another relative, to get professional guidance. Talk with a speech therapist, maybe an audiologist near you.
Also bear in mind that public school districts administer some assessments, and have a legal duty to provide services for children identified as eligible, as young as 3 year.
Robin S. Kuykendall, JD
Advocate & Educate, LLC