diff --git a/.eslintignore b/.eslintignore
index b7dab5e..e21d4ed 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -1,2 +1,6 @@
 node_modules
-build
\ No newline at end of file
+build
+tools
+public
+typings
+craco.config.js
diff --git a/package.json b/package.json
index e0fa03e..ed8f895 100644
--- a/package.json
+++ b/package.json
@@ -109,7 +109,9 @@
     "@typescript-eslint/parser": "4.19.0",
     "antd-dayjs-webpack-plugin": "^1.0.6",
     "babel-plugin-lodash": "^3.3.4",
+    "chalk": "^4.1.0",
     "craco-alias": "^2.2.0",
+    "diff": "^5.0.0",
     "eslint": "^7.22.0",
     "eslint-plugin-react": "^7.22.0",
     "eslint-plugin-react-hooks": "^4.2.0",
diff --git a/src/global/LocaleContext.tsx b/src/global/LocaleContext.tsx
index 608cf42..edd4a55 100644
--- a/src/global/LocaleContext.tsx
+++ b/src/global/LocaleContext.tsx
@@ -46,7 +46,7 @@
     // the TypeScript typings, which causes build warnings due to a missing
     // loader for those files.
     import(
-      /* webpackInclude: /\b(de|fr|nl|pl|pt-br|vi)\.js$/ */
+      /* webpackInclude: /\b(dayjsLocale|de|fr|nl|pl|pt-br|vi)\.js$/ */
       /* webpackMode: "lazy" */
       /* webpackChunkName: "locale-dayjs-[request]" */
       `dayjs/locale/${dayjsLocale}`
@@ -71,7 +71,7 @@
     // Load the locale
     debug("loading timeago locale %s for language %s", timeagoLocale, langCode);
     import(
-      /* webpackInclude: /\b(de|fr|nl|pl|pt-br|vi)\.js$/ */
+      /* webpackInclude: /\b(timeagoLocale|de|fr|nl|pl|pt-br|vi)\.js$/ */
       /* webpackMode: "lazy" */
       /* webpackChunkName: "locale-timeago-[request]" */
       `react-timeago/lib/language-strings/${timeagoLocale}`
@@ -96,7 +96,7 @@
     // Load the locale
     debug("loading antd locale %s for language %s", antLocaleCode, langCode);
     import(
-      /* webpackInclude: /\b(de_DE|fr_FR|nl_NL|pl_PL|pt_BR|vi_VN)\.js$/ */
+      /* webpackInclude: /\b(antLocale|de_DE|fr_FR|nl_NL|pl_PL|pt_BR|vi_VN)\.js$/ */
       /* webpackMode: "lazy" */
       /* webpackChunkName: "locale-antd-[request]" */
       `antd/lib/locale/${antLocaleCode}`
diff --git a/tools/addLanguages.js b/tools/addLanguages.js
new file mode 100644
index 0000000..5d3bbd1
--- /dev/null
+++ b/tools/addLanguages.js
@@ -0,0 +1,60 @@
+// Copyright (c) 2020-2021 Drew Lemmy
+// This file is part of KristWeb 2 under AGPL-3.0.
+// Full details: https://github.com/tmpim/KristWeb2/blob/master/LICENSE.txt
+
+// This script adds the language codes from `languages.json` to LocaleContext,
+// allowing the library locales (dayjs, timeago, antd) to be included in the
+// build.
+
+const { promises: fs } = require("fs");
+const path = require("path");
+
+const chalk = require("chalk");
+const Diff = require("diff");
+
+const languagesJSON = require("../src/__data__/languages.json");
+
+function replaceLocales(src, localeType) {
+  // Get the needed locale filenames for this library
+  const locales = [...new Set(Object.values(languagesJSON)
+    .map(l => l[localeType])
+    .filter(l => !!l))];
+
+  // Construct the regex to search for the locale magic comment. This looks like
+  // `/* webpackInclude: /\b(LOCALE_TYPE|LOCALE|LOCALE|LOCALE|...)\.js$/ */`
+  const searchRe = new RegExp(`(\\/\\* webpackInclude: \\/\\\\b\\(${localeType}\\|).+(\\)\\\\\\.js\\$\\/ \\*\\/)`);
+
+  // Find and replace the magic comment, populating the new locales
+  const localeList = locales.join("|");
+  return src.replace(searchRe, "$1" + localeList + "$2");
+}
+
+async function main() {
+  // Load the contents of LocaleContext
+  const srcDir = path.resolve(__dirname, "../src/global");
+  const srcFile = path.join(srcDir, "LocaleContext.tsx");
+
+  let src = (await fs.readFile(srcFile)).toString();
+  const originalSrc = src; // Used to diff at the end
+
+  // Perform the magic comment replacements for each library
+  src = replaceLocales(src, "dayjsLocale");
+  src = replaceLocales(src, "timeagoLocale");
+  src = replaceLocales(src, "antLocale");
+
+  // Print the line-by-line diff
+  const diff = Diff.diffLines(originalSrc, src);
+  diff.forEach(part => {
+    const colour = part.added ? chalk.green :
+      part.removed ? chalk.red : chalk.grey;
+    process.stderr.write(colour(part.value));
+  });
+  console.log();
+
+  // Save the modified file
+  await fs.writeFile(srcFile, src);
+}
+
+main()
+  .then(() => console.log("Done!"))
+  .catch(console.error);
diff --git a/yarn.lock b/yarn.lock
index c562f10..2cb394b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4550,6 +4550,11 @@
   resolved "https://registry.yarnpkg.com/diff-sequences/-/diff-sequences-26.6.2.tgz#48ba99157de1923412eed41db6b6d4aa9ca7c0b1"
   integrity sha512-Mv/TDa3nZ9sbc5soK+OoA74BsS3mL37yixCvUAQkiuA4Wz6YtwP/K47n2rv2ovzHZvoiQeA5FTQOschKkEwB0Q==
 
+diff@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-5.0.0.tgz#7ed6ad76d859d030787ec35855f5b1daf31d852b"
+  integrity sha512-/VTCrvm5Z0JGty/BWHljh+BAiw3IK+2j87NGMu8Nwc/f48WoDAC395uomO9ZD117ZOBaHmkX1oyLvkVM/aIT3w==
+
 diffie-hellman@^5.0.0:
   version "5.0.3"
   resolved "https://registry.yarnpkg.com/diffie-hellman/-/diffie-hellman-5.0.3.tgz#40e8ee98f55a2149607146921c63e1ae5f3d2875"