SUMMARY If you click the right mouse button on the title bar of any window and select the option "More actions -> Configure special window preferences", the dialog that appears shows some texts untranslated into the user's language. Texts for the radio buttons "Yes" and "No", the buttons "Add Properties" and "Detect Window Properties" at the bottom, and the texts "Instantly" and "After X seconds" appear in English. But if you go to the System Settings, "Workspace" section, "Window management -> Window rules", the same texts appear fully translated into the user's language. Tested in Spanish and Catalan, but I guess this issue affects all languages. STEPS TO REPRODUCE 1. Click the right mouse button on the title bar of any window in Plasma. 2. Select "More Actions -> Configure Special Window Settings..." OBSERVED RESULT Some text are not translated in the dialog that appear. EXPECTED RESULT All text should be translated in that dialog. SOFTWARE/OS VERSIONS Linux: 5.3.18 (openSUSE Leap 15.2) KDE Plasma Version: 5.19 and 5.19.90 KDE Frameworks Version: 5.74.0 Qt Version: 5.15.1 ADDITIONAL INFORMATION Tested only on openSUSE Leap 15.2, but it may affect other (or all) distros.
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/311
Git commit 743b06d3a18728077f20c4e8879c86e4ca44c635 by Albert Astals Cid. Committed on 30/09/2020 at 22:29. Pushed by apol into branch 'master'. Fix kwin_rules_dialog not showing translated strings M +3 -0 kcmkwin/kwinrules/main.cpp https://invent.kde.org/plasma/kwin/commit/743b06d3a18728077f20c4e8879c86e4ca44c635
Git commit 1dfbac734849365014f23a780a18af74242bbc14 by Aleix Pol Gonzalez, on behalf of Albert Astals Cid. Committed on 01/10/2020 at 10:34. Pushed by apol into branch 'Plasma/5.20'. Fix kwin_rules_dialog not showing translated strings (cherry picked from commit 743b06d3a18728077f20c4e8879c86e4ca44c635) M +3 -0 kcmkwin/kwinrules/main.cpp https://invent.kde.org/plasma/kwin/commit/1dfbac734849365014f23a780a18af74242bbc14
Thank you very much for solving so quickly!