What is the canonical way (if there is any) of overriding some entries for translations in plone.app.locales?
I have a policy package, with a locales folder, and I tried to add an updated plonelocales.po there, but it seems the version on plone.app.locales always wins.
In a locales dir in buildout you still need the proper structure. I just saw a project with a file locales/plone.po which did not work. In your case for English it would need to be: locales/en/LC_MESSAGES/widgets.po.
Since this is TinyMCE, these translations may come from javascript. These translations are cached in the browser for a day, in localStorage. So open the developer tools of your browser, check if widgets-en is in localStorage and remove it.
"Current Content" and "Start Page" are in the plone domain (plone.po), but adding these to my overrides have no effect. (Other overrides in the same .po file does have an effect).
I assume they are also buried deep down in some compiled javascript - any tricks for these ones?