root@nextcloud ~# export LANG=ru_RU.UTF-8
root@nextcloud ~# locale
LANG=ru_RU.UTF-8
LANGUAGE=en_US.UTF-8
LC_CTYPE="C"
LC_NUMERIC="C"
LC_TIME="C"
LC_COLLATE="C"
LC_MONETARY="C"
LC_MESSAGES="C"
LC_PAPER="C"
LC_NAME="C"
LC_ADDRESS="C"
LC_TELEPHONE="C"
LC_MEASUREMENT="C"
LC_IDENTIFICATION="C"
LC_ALL=C

root@nextcloud ~# export LC_ALL=ru_RU.UTF-8
root@nextcloud ~# export LANG=ru_RU.UTF-8
root@nextcloud ~# export LANGUAGE=ru_RU.UTF-8
root@nextcloud ~# locale
LANG=ru_RU.UTF-8
LANGUAGE=ru_RU.UTF-8
LC_CTYPE="ru_RU.UTF-8"
LC_NUMERIC="ru_RU.UTF-8"
LC_TIME="ru_RU.UTF-8"
LC_COLLATE="ru_RU.UTF-8"
LC_MONETARY="ru_RU.UTF-8"
LC_MESSAGES="ru_RU.UTF-8"
LC_PAPER="ru_RU.UTF-8"
LC_NAME="ru_RU.UTF-8"
LC_ADDRESS="ru_RU.UTF-8"
LC_TELEPHONE="ru_RU.UTF-8"
LC_MEASUREMENT="ru_RU.UTF-8"
LC_IDENTIFICATION="ru_RU.UTF-8"
LC_ALL=ru_RU.UTF-8
root@nextcloud ~# :�фывфыв^C