Issue regarding colemak keyboard

Hello! My friend have started his trial recently and he's using a Colemak keyboard.
Everything works fine until he types in chat. When he moves, the keybinds work just like a Qwerty keyboard, but when he needs to type, it changes to Qwfpg which is really frustrating. He wants it to stay in Qwerty even when he's typing.
Although it can be temporarily solved by press Alt+tab, I wonder if there's a way to stop the game from changing the keyboard layout automatically.