Split language from region: omarchy-language and Setup > Language own LANG

omarchy-region and install/config/region.sh no longer touch the locale;
both logout prompts are worded through omarchy-text.

shell/plugins/menu/MenuModel.js

@@ -414,7 +414,8 @@ var GUARD_READERS = [
   "omarchy-default-editor",
   "omarchy-default-terminal",
   "omarchy-dns",
-  "omarchy-region"
+  "omarchy-region",
+  "omarchy-language"
 ]
 
 // Package and command presence account for most of what the guards ask, and