Hellobee Boards

I don't know from personal experience, but I have a friend who speaks at least 3 languages and her native, her husbands native, and english are all languages that they've taught their daughter. She was a bit behind verbally, but eventually came around and now speaks amazingly fluently in all 3.

This is a very interesting video about children learning languages, and the key time where they start to recognize sounds.
http://www.ted.com/talks/patricia_kuhl_the_linguistic_genius_of_babies.html

Based on this I don't think babies can differentiate between different languages at that age. They are like a sponge and will hear the sounds and mimic whatever they hear. So if she isn't making many sounds yet, I don't think it would have made a difference if she were only hearing one language or 10, that is just her pace right now.

At 18 months my son was slightly behind but we didn't worry precisely because of this. Then he had an absolute language explosion and I am so amazed by how he juggles two languages at two years old. Our pedi told us at three is when he'd start to "get" that each language was its own thing, but he seems to understand that pretty well already. He does speak adorable Spanglish though

My LO is 18 months and has a huge vocab, and although my DH and I only speak English to him, my MIL(who watches him for a few hours every day) and other family friends speak to him in Tamil regularly.. He translates some things back and forth for us, like water/thanie so not exactly a 24-7 multi lingual environment but I don't think it's hurt him at all.. Don't worry!

I also hate those weekly emails and have stopped paying attention to them. They drove me crazy because LO crawled before he sat up on his own, so he seemed super behind for a while!