Comment 2 for bug 1519602

I also find I need to set the LOCPATH environment variable (this with the locales-all package in stage packages):

stub@uurp:/home/stub$ locale
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=en_AU.UTF-8
LANGUAGE=en_AU:en_GB:en_US:en
LC_CTYPE="en_AU.UTF-8"
LC_NUMERIC=en_AU.UTF-8
LC_TIME=en_AU.UTF-8
LC_COLLATE="en_AU.UTF-8"
LC_MONETARY=en_AU.UTF-8
LC_MESSAGES="en_AU.UTF-8"
LC_PAPER=en_AU.UTF-8
LC_NAME=en_AU.UTF-8
LC_ADDRESS=en_AU.UTF-8
LC_TELEPHONE=en_AU.UTF-8
LC_MEASUREMENT=en_AU.UTF-8
LC_IDENTIFICATION=en_AU.UTF-8
LC_ALL=
stub@uurp:/home/stub$ export LOCPATH=$SNAP/usr/lib/locale
stub@uurp:/home/stub$ locale
LANG=en_AU.UTF-8
LANGUAGE=en_AU:en_GB:en_US:en
LC_CTYPE="en_AU.UTF-8"
LC_NUMERIC=en_AU.UTF-8
LC_TIME=en_AU.UTF-8
LC_COLLATE="en_AU.UTF-8"
LC_MONETARY=en_AU.UTF-8
LC_MESSAGES="en_AU.UTF-8"
LC_PAPER=en_AU.UTF-8
LC_NAME=en_AU.UTF-8
LC_ADDRESS=en_AU.UTF-8
LC_TELEPHONE=en_AU.UTF-8
LC_MEASUREMENT=en_AU.UTF-8
LC_IDENTIFICATION=en_AU.UTF-8
LC_ALL=

stub@uurp:/home/stub$ LC_ALL=zh_TW.utf8 locale
LANG=en_AU.UTF-8
LANGUAGE=en_AU:en_GB:en_US:en
LC_CTYPE="zh_TW.utf8"
LC_NUMERIC="zh_TW.utf8"
LC_TIME="zh_TW.utf8"
LC_COLLATE="zh_TW.utf8"
LC_MONETARY="zh_TW.utf8"
LC_MESSAGES="zh_TW.utf8"
LC_PAPER="zh_TW.utf8"
LC_NAME="zh_TW.utf8"
LC_ADDRESS="zh_TW.utf8"
LC_TELEPHONE="zh_TW.utf8"
LC_MEASUREMENT="zh_TW.utf8"
LC_IDENTIFICATION="zh_TW.utf8"
LC_ALL=zh_TW.utf8