Sierra refuses to say anything we try to teach her to say. She'll whistle lots of things we teach her, but she will only say things we say in regular communication. She didn't talk until close to two years, except for parrot babble. My husband and I would do this routine:
Husband: You're so pretty!
Me: and so smart!
Husband: and so talkative!
together: no, not talkative.
We thought she would never talk, so we did that in a sing song voice just to amuse ourselves. One day Sierra said:
Sierra: You're so pretty!
So I said:and so smart!
So my husband and I together said AND SO TALKATIVE! Yes! Talkative!
And she picked that line right up and we do the routine all the time. She won't do it unless she initiates it, though. I've never heard her say "smart".
Once when we were leaving on a two week long trip I had a heart to heart with Sierra explaining where we were going and that our friend Olivia was going to be staying with her to take care of her. I went into great detail about everything and Sierra listened carefully. I said good bye and started leaving. Sierra started pacing the cage and put together two phrases that I have never put together......She said "time to go bye bye" (which she hears all the time, every morning) followed by "no! no! no!" (which she hears when she's being naughty.) It broke my heart.
Also, I have a potty mouth. Sierra has never uttered some of the profanity I use on a regular basis. One day I dropped something and said "sh**" with drama and flair. Sierra chimed right in, but she said "Gosh darn it!". I think she disapproves of my bad language.
Anyway, the main point is that Sierra never says things we try to blatantly teach her. She really doesn't talk all that much. She will NEVER perform, especially for strangers. But she does use words and phrases in context. We talk to her like she understands it all, and I think she does.
One more story. I was sitting on the couch and suddenly looked up at Sierra who was on her cage. She was staring at me. I swear I suddenly had an understanding that Sierra wanted her full spectrum light on....I can't explain the feeling. It wasn't words, it wasn't a vision, it was just a knowing. So I got up and turned it on. Sierra looked right at me and said "thank you."