Comment 2 for bug 1235608

Thanks for reporting this
According to your log, there are errors like that:

Fontconfig warning: "/etc/fonts/conf.d/30-cjk-aliases.conf", line 182: Having multiple <family> in <alias> isn't supported and may not work as expected
Fontconfig warning: "/etc/fonts/conf.d/99-language-selector-zh.conf", line 11: Having multiple values in <test> isn't supported and may not work as expected

Please can you check if that bug report helps you?

https://bugs.launchpad.net/ubuntu/+source/language-selector/+bug/1191450

You should check the language-selector package version and try to update to the latest version.

Best
Yolanda