I needed to input some Russian characters so used setxkbmap ru. To switch back I used setxkbmap gb (from awkwardly compounding previous commands from history - be warned...)
But now when I use shortcuts like Ctrl + Shift + U in every program an underlined 'u' is output rather than the expected action.
I see mention of ibus in other answers or using GUI language settings but I am running Archlabs linux and I cannot find any language options.
