Character-based input methods, such as Chinese, do not activate their character-selection window when typing in Neovim, and instead just type the regular alphabet. The image below is what should happen; this window simply doesn't appear in Neovim.
Steps to reproduce:
Add and activate a Chinese (or Japanese, I suppose) input method in System > Keyboard > Input Methods.
Type in Neovim. (Compare by typing in another program.)
Character-based input methods, such as Chinese, do not activate their character-selection window when typing in Neovim, and instead just type the regular alphabet. The image below is what should happen; this window simply doesn't appear in Neovim.
Steps to reproduce:
Neovim info: