diff --git a/package-lock.json b/package-lock.json
index eb9c5486..d3355fbc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
     "name": "code-background",
-    "version": "3.0.2",
+    "version": "4.0.0",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "code-background",
-            "version": "3.0.2",
+            "version": "4.0.0",
             "license": "GPL-2.0-only",
             "devDependencies": {
                 "@types/node": "22.10.1",
diff --git a/package.json b/package.json
index 29ee31cb..4218ef22 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
         "theme": "dark"
     },
     "publisher": "Katsute",
-    "version": "3.0.2",
+    "version": "4.0.0",
     "private": true,
     "engines": {
         "vscode": "^1.96.0"
@@ -339,7 +339,6 @@
         }
     },
     "main": "dist/index.js",
-    "l10n": "./l10n",
     "scripts": {
         "// -- dev -- //": "",
         "clean": "rimraf --glob dist & rimraf --glob code-background-*.vsix",
diff --git a/src/extension/package.ts b/src/extension/package.ts
index 23f940c8..b35c0561 100644
--- a/src/extension/package.ts
+++ b/src/extension/package.ts
@@ -16,7 +16,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-export const pkg = require("../../package.json"); // do not convert to import
+export const pkg = Object.freeze(require("../../package.json")); // do not convert to import
 
 export type ConfigurationKey =
     "windowBackgrounds" |
diff --git a/src/lib/l10n.ts b/src/lib/l10n.ts
new file mode 100644
index 00000000..0aa1e30a
--- /dev/null
+++ b/src/lib/l10n.ts
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2024 Katsute <https://github.com/Katsute>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+import { env } from "vscode";
+
+type LocaleSet = {[key: string]: string};
+
+// https://code.visualstudio.com/docs/getstarted/locales
+const Locales: {[key: string]: LocaleSet} = Object.freeze({
+    "en": Object.freeze(require("../../package.nls.json"))
+});
+
+const getString: () => LocaleSet = () => Locales[env.language] ?? {};
+
+export const format: (key: string, ...args: any[]) => string = (key: string, ...args: any[]): string => {
+    const str: string = getString()[key] ?? getString()["en"] ?? key;
+    return str.replace(/{(\d+)}/g, (m, i) => args[i] ?? m);
+}
\ No newline at end of file