Some code in the Translation plugin has changed some time ago, and now it needs to be loaded as a "helper" (instead of "syntax"). Two function calls to the new Translation code were changed also and are now fixed.
Thank you! I’ve incorporated these changes into my fresh installation of DokuWiki + vector + Translation, and navigation box contents are being localized as intended.
Some code in the Translation plugin has changed some time ago, and now it needs to be loaded as a "helper" (instead of "syntax"). Two function calls to the new Translation code were changed also and are now fixed.