As a user with right "centralnotice-admin", I can indicate that translatable strings for a central notice are made a message group in the Translate extension (analogous to translation of workflow states) so that copy/paste for translators is no longer needed.
Brief acceptance criteria:
- Honor "Languages" set (as forced priority languages).
- Simply use a checkbox in CN: "Use Translate extension" when there is content for all message keys in the banner definition. (step 3a).
Hook example: wfRunHooks( 'TranslatePostInitGroups', array( &$wgTranslateCC, &$deps, &$autoload ) );