I'd like to set a locale for my user different than system locale.

By putting export LANG=en_US.utf8 in .bashrc I could do that for the shells, but still it's not working for applications not started via a shell (i.e. the desktop environment, LXDE, which is started through GDM3).

Is there any way to set a different default locale (used by any kind of application, even if not started via bash) for my user?