I'm pretty sure my husband and I offer no hope to our son being able to learn to talk.
It started with "uh oh." It came out of our son's mouth and we both couldn't believe it! It was adorable and 100% in the correct context! He's a little genius. Then to show everyone how adorable our child is that knows how to say "uh oh" we tried to get him to say it all the time. At first I'm guessing he was thinking, "Mom...that's totally not the correct context. There's nothing to be uh-ohing about." Then I'm sure he finally got to the point where, yup, this is a really cool thing to say and people think I'm cute when I do it. What does it mean again?
Then he said it all.the.time. Totally losing any idea of what it actually means.
Then we wanted to teach him to tell us when he was done with his meal or to let him know when he needs to calm his shit down because the yogurt is, indeed, all gone. So we would say it after every meal and at the end of every yogurt cup. All gone. Then our adorable William said it back - "Ahw gah**!" Holy crap, he's adorable. Once again - totally in the correct context. Then we ruined another phrase by saying it all the time to hear him say it because, well, it's frickin adorable.
Now he says it all.the.time. Again...totally losing any concept of what the context is.
Then there is the song by LMFAO - "Sexy and I Know It." My son. Yeah, the cute one in all of my pictures, yeah him. Totally says wiggle because we sing that part all the time. Another word that will add about no value to his speech skills but it's hilarious and so cute I want to kiss his fat cheeks.
That is all.
**It is totally hard to spell out all gone in the way a 16 month old says it. This was the best I could do. hehe