I'm not able to change language of frontend. Language in user profile is saved, po file is presented (/var/www/zabbix/locale/sk/LC_MESSAGES/frontend.po), but frontend is always in English. Tested with current version Firefox, IE, also apache has been restarted, but it didn't help. No errors in apache error log. Tested on local VM (Debian) rev 46285 (the same issue has also rev 45994).

Default system locale:

LANG=en_GB.UTF-8
LANGUAGE=en_GB:en
LC_CTYPE="en_GB.UTF-8"
LC_NUMERIC="en_GB.UTF-8"
LC_TIME="en_GB.UTF-8"
LC_COLLATE="en_GB.UTF-8"
LC_MONETARY="en_GB.UTF-8"
LC_MESSAGES="en_GB.UTF-8"
LC_PAPER="en_GB.UTF-8"
LC_NAME="en_GB.UTF-8"
LC_ADDRESS="en_GB.UTF-8"
LC_TELEPHONE="en_GB.UTF-8"
LC_MEASUREMENT="en_GB.UTF-8"
LC_IDENTIFICATION="en_GB.UTF-8"