Not the best one

Couldnt use it on my iPhone 6 Plus, because the buttons are too small and too close to each other, so the idea of using only thumb to type is not working. Also no info on languages and its only English, I needed more than one and couldnt find it the description

Dubininanna about Handy - The One-Hand Keyboard for iPhone 6 and 6 Plus Quick & Easy 1 Handed Typing, v1.1