Unable to input in different languages


Kubuntu 18.04
Atom snap classic install - 1.31.2 x64

My key to access different input methods is normally Ctrl + space but it doesn’t work in Atom for some reason. So then I tried to just change it by clicking it manually in the KDE UI, it does change the input method but it doesn’t allow me to type in that language (Japanese/Chinese).

I don’t know what I’m doing wrong, can someone help?