Hmm... I don't know what "hash collision" means, but apparently there is something wrong with your locale (which most likely explains why the zh_TW.UTF-8 locale wasn't created successfully initially).
I would suggest that you regenerate all the locales with this command: sudo locale-gen --purge I don't speak any flavour of Chinese, so I'm not able to see what the problem would be with certain labels in System Settings. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to language-selector in Ubuntu. https://bugs.launchpad.net/bugs/1535214 Title: zh_TW is not set as fallback locale when selecting Hong Kong as location Status in language-selector package in Ubuntu: Incomplete Status in localechooser package in Ubuntu: Confirmed Status in ubiquity package in Ubuntu: Confirmed Bug description: In 15.10, when selecting Hong Kong as the user location during installation, zh_TW is not set as a fallback language like before (i.e. 'LANGUAGE=zh_HK:en' rather than 'zh_HK:zh_TW:en'). Worse still, there is no 'Chinese (Taiwan)' available in 'Menu language' in 'Language support' like before (Both of them should be packed into one locale option 'Chinese (Traditional)'). This is a major issue as most Hong Kong users rely on zh_TW locale as many software are not translated into zh_HK. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/language-selector/+bug/1535214/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp