Found an issue when using Spanish as UI language:
The View (open book) action gives "Menu entry: View (plugin_name: View) cannot be found"
I've only recently started looking at how translation works in Calibre plugins, but I guess that would be a missing translation in es.po from:
Code:
#: /__w/calibre/calibre/src/calibre/gui2/actions/view.py:51
msgid "View"
msgstr "Mostrar"
Upon changing UI to Spanish, the View action will lose selection state: