The plugin name from kdepim-addons.git/plugins/plasma/pimeventsplugin/pimeventsplugin.json is not extracted to any .pot files for translation. It is visible in the Digital Clock plasmoid configuration dialog.
Created attachment 109429 [details] screenshot
There is a patch: https://phabricator.kde.org/D3811#75987 , but it's still not applied.
Git commit 96eb6869f2c39482e3c00db5bd824e8d5b4f1072 by Montel Laurent. Committed on 17/12/2017 at 15:59. Pushed by mlaurent into branch 'master'. Apply patch (unapplied) from Dan (Untranslatable config tab "PIM Events Plugin" bug 387987) M +14 -7 plugins/plasma/pimeventsplugin/pimeventsplugin.json https://commits.kde.org/kdepim-addons/96eb6869f2c39482e3c00db5bd824e8d5b4f1072