What is the correct way to keep english as my system language but change only date, time, units ?
I want date with day/month/year, time with 24h, units with metric system.
I tried using KDE settings and set all of those to “Europe English (en_150)”, but I get an error message at boot :
kwin_x11 kwin_xkbcommon: XKB: couldn't find a Compose file for locale "en_150.UTF-8"
So from this message I think it’s not set correctly.
I use azerty keyboard with both french and arab keyboard layouts but want to keep english as system language and use metric system with it.