diff --git a/modules/nixos/services/base/default.nix b/modules/nixos/services/base/default.nix
index d3d371c..e850ae1 100644
--- a/modules/nixos/services/base/default.nix
+++ b/modules/nixos/services/base/default.nix
@@ -13,8 +13,18 @@ in
   config = mkIf cfg.enable {
     # Configure console keymap
     console.keyMap = "us";
+
+  # Select internationalisation properties.
+    i18n.defaultLocale = "en_US.UTF-8";
     i18n.extraLocaleSettings = {
+      LC_ADDRESS = "de_DE.UTF-8";
+      LC_IDENTIFICATION = "de_DE.UTF-8";
+      LC_MEASUREMENT = "de_DE.UTF-8";
       LC_MESSAGES = "en_US.UTF-8";
+      LC_MONETARY = "de_DE.UTF-8";
+      LC_NAME = "de_DE.UTF-8";
+      LC_NUMERIC = "de_DE.UTF-8";
+      LC_TELEPHONE = "de_DE.UTF-8";
       LC_TIME = "de_DE.UTF-8";
     };