Our female Congo African grey parrot Arua is not normal. We say that as a compliment. Arua is intelligent. And she is multilingual. She is smart for a parrot, and she's smarter than many people we know! But surely most African grey parrot people say that about their African grey parrots.
Arua is a rescue parrot. She came to us speaking both Polish and English. Unfortunately she has pretty much dropped the Polish words and phrases, except for one: Apuka. We don't speak Polish, so no reason for her to continue speaking Polish to us. Except for that one word that she favors. Apparently apuka is Polish for a mischievous little elf. That Arua certainly is!
Arua lived with a Polish fellow in Spokane, Washington, across the state from us, for years and years, which is where she picked up speaking Polish. Sadly this fellow up and died one New Year's Eve several years ago. No one figured it out for three days until a friend of his living in the Seattle area alerted an acquaintance in the Spokane area that he wasn't answering her calls. She drove across the state, picked up the parrot and brought her back to her home in Edmonds, outside of Seattle. Not knowing what to do with a Polish-speaking African grey parrot, she posted the bird on Craigslist. Fortunately we were the first people to respond to the post!
We quickly learned that we had a very talented and very multilingual parrot on our hands! Not only did Arua speak Polish and English, but dog and cat, as well as several avian dialects. In no time at all she was speaking Chickadee as well as any Black-capped Chickadee in our back yard.