Phones learn from what you’re typing. The more you type (typo) something, the more they will recommend it to you. Vicious cycle if it auto corrupts it for you, and you miss it/ignore it thinking the other party will understand you fine. Eventually it learns the ironic typos as actual words and then you’re stuck with them when you type. I kind of wish there’s a way to review / manage the autocomplete dictionaries, but I haven’t tried hard enough to find out yet.