Adding keywords in the relevant .desktop files should be enough to make this work in other DE's too. I just tried it in KDE (by adding a 'comment=... (like notepad)' line in ~/.local/share/applications/org.kde.kwrite.desktop), it works as expected
New to KDE and .desktop shortcuts were something I really liked coming from Windows. I can enter in whatever terms I want to use for an item to appear in search, no relying on filename.
Adding keywords in the relevant .desktop files should be enough to make this work in other DE's too. I just tried it in KDE (by adding a 'comment=... (like notepad)' line in ~/.local/share/applications/org.kde.kwrite.desktop), it works as expected