AFAICS it works fine on my Leap 15.5 and on my TW VM (installed a while ago): Leap 15.5: [sh @ balrog] ~ 1 % zypper locales Code | Language | Requested ------+-------------------------+---------- de | German | Fallback de_DE | German (Germany) | Requested en | English | Fallback en_US | English (United States) | Requested TW VM: [sh @ linux] ~ 10 % zypper locales Code | Language | Requested ------+-------------------------+---------- en | English | Fallback en_US | English (United States) | Requested I don't know where libzypp stores that information. Do you know?