Now i downloaded latest 'master' release, i can see that language option is missing from user options page.
Also in administrator settings, the default language button dont show languages!

I had to change default language & user language through database, also missing L_sys_for translation for sector buy in overview
Also problem in localization admin menu when trying to get texts
Warning: Invalid argument supplied for foreach() in C:\AppServ\www\admin\admin_locale.php on line 213