Created attachment 5071 Edit window of xfce4-xkb-plugin-0.5.5 I use XFce-4.10 in Russian localization. Following issue, marked in bug #10091 Oryginally seen in 0.5.4.3, verified for 0.5.5. At least in Russian translation window title of 'Изменить' (Edit) layout 'Добавить раскладку' (Add layout) is the same with 'Добавить' (Add). But this title is correct only for 'Add'. It will be fine if xfce4-xkb-plugin in XFce-4.12 will display different title of this window: Keep oryginal ('Добавить раскладку' (Add layout)) for 'Add' action. And display something like 'Выбрать раскладку' (Select layout) for 'Edit action'.
Ah, indeed - I misread your comments on bug 10091; I see what you mean now. This is fixed in git and will show up in the next release; translations will likely take a while to trickle down though.