Dr. d'Armond Speers wanted to observe whether baby Alec would pick up Klingon as naturally as most babies learn English or any other real language. Speers was especially giddy about the prospect of Alec's first word being "vav" (the Klingon term for "daddy"). Although Alec, now 13, doesn't speak Klingon at all, at the time "He was definitely starting to learn it... When Alec spoke back to me in Klingon his pronunciation was excellent."
This dude should have tried getting his son to speak fluent Sindarin or Quenya. Now that would have been impressive!