diff --git a/base.nix b/base.nix
index 5b4daa9..b2e0fd6 100644
--- a/base.nix
+++ b/base.nix
@@ -99,6 +99,19 @@
 
   ######################################## Localization ###########################################
   i18n.defaultLocale = "en_US.UTF-8";
+
+  i18n.extraLocaleSettings = {
+    LC_ADDRESS = "fi_FI.UTF-8";
+    LC_IDENTIFICATION = "fi_FI.UTF-8";
+    LC_MEASUREMENT = "fi_FI.UTF-8";
+    LC_MONETARY = "fi_FI.UTF-8";
+    LC_NAME = "fi_FI.UTF-8";
+    LC_NUMERIC = "fi_FI.UTF-8";
+    LC_PAPER = "fi_FI.UTF-8";
+    LC_TELEPHONE = "fi_FI.UTF-8";
+    LC_TIME = "fi_FI.UTF-8";
+  };
+
   services.xserver.xkb = {
     layout = "us,";
     variant = "de_se_fi,";