I’m currently learning Japanese, and one of my favorite things right now is that the “normal” phone keyboard for Japanese is basically a t9 on steroids. It gives you this grid with huge buttons, you tap a letter or swipe in a cardinal direction to get a variant. E.g., the button will show か (ka) and swiping will get you く、け、こ、き (ku, ke, ko, ki).

It is super intuitive and with like a few minutes of training I was typing faster on it than my English keyboard (albeit with my very very limited vocabulary). The buttons are so large it’s hard to miss.