How to change language in 18.12

[erdalterzi]

Hi there, until RC versions of 18.12, sys language can easily be changed by modifying /etc/login.conf. Recently it does not work at all. I first select Turkish language at install time but still English after reboot. Then I alter /etc/login.conf file to suit lang="tr_tr.ISO-UTF8 with cap_mkdb command yet nothing changes. Does anyone have any idea to change system language?