diff --git a/package.json b/package.json
index ff012aae..802e0ff1 100644
--- a/package.json
+++ b/package.json
@@ -46,13 +46,15 @@
   "license": "MPL-2.0",
   "repository": "mozilla/send",
   "availableLanguages": [
-    "en-US",
-    "zh-TW",
-    "zh-CN",
     "cs",
+    "cy",
+    "de",
+    "dsb",
+    "en-US",
+    "es-MX",
     "fr",
     "fy-NL",
-    "de",
+    "hsb",
     "hu",
     "it",
     "ja",
@@ -60,19 +62,14 @@
     "ms",
     "nb-NO",
     "nn-NO",
-    "pt-PT",
     "pt-BR",
+    "pt-PT",
     "ru",
     "sk",
     "sl",
-    "dsb",
-    "hsb",
-    "es-CL",
-    "es-ES",
-    "es-MX",
     "sv-SE",
-    "tr",
-    "cy"
+    "zh-CN",
+    "zh-TW"
   ],
   "scripts": {
     "build": "npm-run-all build:*",
@@ -82,9 +79,14 @@
     "build:l10n": "cp node_modules/l20n/dist/web/l20n.min.js public",
     "dev": "npm run build && npm start",
     "format": "prettier '{frontend/src/,scripts/,server/,test/**/!(bundle)}*.js' 'public/*.css' --single-quote --write",
+    "get-prod-locales": "node scripts/get-prod-locales",
+    "get-prod-locales:write": "npm run get-prod-locales -- --write",
     "lint": "npm-run-all lint:*",
     "lint:css": "stylelint 'public/*.css'",
     "lint:js": "eslint .",
+    "lint-locales": "node scripts/lint-locales",
+    "lint-locales:dev": "npm run lint-locales",
+    "lint-locales:prod": "npm run lint-locales -- --production",
     "start": "node server/server",
     "test": "npm-run-all test:*",
     "test:unit": "mocha test/unit",
diff --git a/scripts/.eslintrc.yml b/scripts/.eslintrc.yml
new file mode 100644
index 00000000..dfaf2328
--- /dev/null
+++ b/scripts/.eslintrc.yml
@@ -0,0 +1,6 @@
+rules:
+  node/shebang: off
+  security/detect-child-process: off
+
+  no-console: off
+  no-process-exit: off
diff --git a/scripts/get-prod-locales.js b/scripts/get-prod-locales.js
new file mode 100755
index 00000000..27c86e26
--- /dev/null
+++ b/scripts/get-prod-locales.js
@@ -0,0 +1,49 @@
+#!/usr/bin/env node
+
+const cp = require('child_process');
+const { promisify } = require('util');
+const fs = require('fs');
+const pkg = require('../package.json');
+
+const availableLanguages = pkg.availableLanguages.sort();
+const exec = promisify(cp.exec);
+
+const arrayDiff = (current, package) =>
+  current.filter(locale => !package.includes(locale));
+
+const cmd = 'compare-locales l10n.toml . `ls public/locales` --data=json';
+
+exec(cmd)
+  .then(({ stdout }) => JSON.parse(stdout))
+  .then(({ summary }) => {
+    const locales = Object.keys(summary)
+      .filter(locale => {
+        const loc = summary[locale];
+        const hasMissing = loc.hasOwnProperty('missing');
+        const hasErrors = loc.hasOwnProperty('errors');
+        return !hasMissing && !hasErrors;
+      })
+      .sort();
+
+    if (locales.join(',') !== availableLanguages.join(',')) {
+      const missingLanguages = arrayDiff(locales, availableLanguages);
+
+      console.log('current 100%:', JSON.stringify(locales));
+      console.log('package.json:', JSON.stringify(availableLanguages));
+      console.log('missing prod:', JSON.stringify(missingLanguages));
+
+      if (process.argv.includes('--write')) {
+        const pkgPath = require.resolve('../package.json');
+        pkg.availableLanguages = locales;
+        const str = JSON.stringify(pkg, null, 2) + '\n';
+        console.log('Updating /package.json availableLanguages');
+        fs.writeFileSync(pkgPath, str, 'utf-8');
+      }
+    } else {
+      console.log('Production locales are up to date!');
+    }
+  })
+  .catch(err => {
+    console.error(err);
+    process.exit(1);
+  });
diff --git a/scripts/lint-locales.js b/scripts/lint-locales.js
new file mode 100644
index 00000000..fbcf84ef
--- /dev/null
+++ b/scripts/lint-locales.js
@@ -0,0 +1,51 @@
+#!/usr/bin/env node
+
+const cp = require('child_process');
+const { promisify } = require('util');
+const pkg = require('../package.json');
+const conf = require('../server/config');
+
+const exec = promisify(cp.exec);
+const cmd = `compare-locales l10n.toml . ${getLocales()} --data=json`;
+
+console.log(cmd);
+
+exec(cmd)
+  .then(({ stdout }) => JSON.parse(stdout))
+  .then(({ details }) => filterErrors(details))
+  .then(results => {
+    if (results.length) {
+      results.forEach(({ locale, data }) => {
+        console.log(locale);
+        data.forEach(msg => console.log(`- ${msg}`));
+        console.log('');
+      });
+      process.exit(2);
+    }
+  })
+  .catch(err => {
+    console.error(err);
+    process.exit(1);
+  });
+
+function filterErrors(details) {
+  return Object.keys(details)
+    .sort()
+    .map(locale => {
+      const data = details[locale]
+        .filter(item => item.hasOwnProperty('error'))
+        .map(({ error }) => error);
+      return { locale, data };
+    })
+    .filter(({ data }) => data.length);
+}
+
+function getLocales() {
+  // If we're in a "production" env (or passed the `--production` flag), only
+  // check the locales from the package.json file's `availableLanguages` array.
+  if (conf.env === 'production' || process.argv.includes('--production')) {
+    return pkg.availableLanguages.sort().join(' ');
+  }
+  // Lint all the locales.
+  return '`ls public/locales`';
+}