I'm pretty sure I saw something several years ago about a whole dialect (argot? jargon? slang?) that had developed among young people in Japan (or possibly some other Asian country), based on phone cupertinos. Basically, they used the first suggestion from the autocomplete function *instead* of the original target word, to create an argot that was reasonably opaque to outsiders.
Now that comment has been brought back from the dead, appearing in two different articles about autocorrect.