Откройте консоль и введите: locale
Должно быть что-то типа:
# locale
LANG=ru_UA.UTF-8
LC_CTYPE="ru_UA.UTF-8"
LC_NUMERIC="ru_UA.UTF-8"
LC_TIME="ru_UA.UTF-8"
LC_COLLATE=en_US
LC_MONETARY="ru_UA.UTF-8"
LC_MESSAGES="ru_UA.UTF-8"
LC_PAPER="ru_UA.UTF-8"
LC_NAME="ru_UA.UTF-8"
LC_ADDRESS="ru_UA.UTF-8"
LC_TELEPHONE="ru_UA.UTF-8"
LC_MEASUREMENT="ru_UA.UTF-8"
LC_IDENTIFICATION="ru_UA.UTF-8"
LC_ALL=