Other languages characters don't show in recovery mode

[Rockworld]

Hello,

When I set the system locale into Thai and when it boots up into recovery mode, it appears menu that actually should be displayed using Thai character, but it display diamonds instead of proper Thai characters. And this bug is not just Thai language, it was also found in other languages like Chinese and Japanese too. I hope it will be fixed. Thank you.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1707426/+editstatus and add the package name in the text box next to the word Package.

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[Mitsuya Shibata (cosmos-door)]

I confirmed on artful.
It seems that LANG and LANGUAGE are setted when source /etc/default/locale to check blacklist.
However LANG and LANGUAGE are not clear even if locale is blacklisted, just "do not export it".
Therefore LANG and LANGUAGE are remained sourced value from /etc/default/locales.

[Mitsuya Shibata (cosmos-door)]

Already fixed via LP: #1752362