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I can go now to Gnome settings, keyboard, and I would only see as language English (US). I add a new input source such as English (UK). It works fine and I can use it and change between the two layouts. But the moment I reboot the computer, it will go only to English (US).
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Do you use fcitx5?
https://bbs.archlinux.org/viewtopic.php?id=302997
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