There is no way to format the percentage values for the Width and Height values on the main application menu. For instance, Turkish uses number-preceding percentage sign format, not following, but there is no way to set that.
A possibly relevant merge request was started @ https://invent.kde.org/utilities/yakuake/-/merge_requests/82
Git commit bba7198b5a539a3e058c9e60a38f5fada8e13557 by Christoph Cullmann, on behalf of Nicolas Fella. Committed on 19/11/2022 at 19:14. Pushed by cullmann into branch 'master'. Make percent values translatable Some languages have a different order of number and percent sign M +2 -2 app/mainwindow.cpp https://invent.kde.org/utilities/yakuake/commit/bba7198b5a539a3e058c9e60a38f5fada8e13557