diff --git a/src/common/litI18nUtils.js b/src/common/litI18nUtils.js
new file mode 100644
index 0000000..1f95baa
--- /dev/null
+++ b/src/common/litI18nUtils.js
@@ -0,0 +1,43 @@
+import {configureLocalization, updateWhenLocaleChanges} from '@lit/localize';
+import {LitElement} from 'lit';
+
+import MWI18nClient from '../common/mainWorldI18n/Client.js';
+import {allLocales, sourceLocale, targetLocales} from '../lit-locales/generated/locales.js';
+
+export class I18nLitElement extends LitElement {
+  #MWI18nClient;
+
+  constructor() {
+    super();
+    updateWhenLocaleChanges(this);
+    this.#MWI18nClient = new MWI18nClient();
+    this.#setUpLitL10n();
+  }
+
+  #setUpLitL10n() {
+    let pLocale;
+    if (chrome.i18n) {
+      pLocale = Promise.resolve(chrome.i18n.getUILanguage());
+    } else {
+      pLocale = this.#MWI18nClient.getUILanguage();
+    }
+    pLocale.then(browserLocale => {
+      let locale = browserLocale.substr(0, 2).toLowerCase();
+      if (locale == 'pt') locale = 'pt_BR';
+      const sanitizedLocale = allLocales.includes(locale) ? locale : 'en';
+      setLocale(sanitizedLocale);
+    });
+  }
+}
+
+export const {getLocale, setLocale} = configureLocalization({
+  sourceLocale,
+  targetLocales,
+  loadLocale: locale => {
+    if (!allLocales.includes(locale)) locale = 'en';
+    return import(
+        /* webpackMode: "eager" */
+        /* webpackExclude: /locales\.json$/ */
+        `../lit-locales/generated/${locale}.js`);
+  },
+});