moved local to modules

home-modules/default.nix

@@ -1,5 +1,6 @@
 {...}: {
   imports = [
     ./flipperzero.nix
+    ./i18n.nix
   ];
 }

home-modules/i18n.nix

@@ -0,0 +1,42 @@
+{
+  lib,
+  config,
+  ...
+}: {
+  options = {
+    i18n = {
+      defaultLocale = lib.mkOption {
+        type = lib.types.str;
+        default = "en_US.UTF-8";
+        example = "nl_NL.UTF-8";
+        description = ''
+          The default locale.  It determines the language for program
+          messages, the format for dates and times, sort order, and so on.
+          It also determines the character set, such as UTF-8.
+        '';
+      };
+
+      extraLocaleSettings = lib.mkOption {
+        type = lib.types.attrsOf lib.types.str;
+        default = {};
+        example = {
+          LC_MESSAGES = "en_US.UTF-8";
+          LC_TIME = "de_DE.UTF-8";
+        };
+        description = ''
+          A set of additional system-wide locale settings other than
+          `LANG` which can be configured with
+          {option}`i18n.defaultLocale`.
+        '';
+      };
+    };
+  };
+
+  config = {
+    home.sessionVariables =
+      {
+        LANG = config.i18n.defaultLocale;
+      }
+      // config.i18n.extraLocaleSettings;
+  };
+}