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Here is the translation of his post:
Has anyone encountered a similar problem? ?
Under the use of fcitx5, neither line nor notepad++ can use Ctrl + Space to switch input methods, let alone typing. This should not be a manjaro problem but a kde problem, because I used the xfce version before without problems. Or is it faster to just give up plasma and use gnome? ? Is there a conflict between kde and xim? ? thanks