Description of problem: It does not seem to be a way to specify a desired coding in profiles. As a command line option to do that is not apparent as well then I do not see how to create icons and/or menu entries to open terminals with various codings. This effect is trivially achievable with earlier version of Gnome by picking up in profiles a proper font set which, regretably, is no longer possible. Mousing all the time quickly becomes old especially that "Reset Terminal" resets also coding to a default.
This is already filed on gnome.org I believe, or at least I looked at it a bit. The reason it's not there is that the default encoding is currently from $LANG If it's in the profile it probably has to have a "use $LANG" option which would be the default. It's possible some sort of "env variables to set" feature for profiles would be more generally useful and also fix this.
Moved to http://bugzilla.gnome.org/show_bug.cgi?id=103275