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diff --git a/packages/demobank-ui/src/components/LangSelector.tsx b/packages/demobank-ui/src/components/LangSelector.tsx
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+/*
+ This file is part of GNU Taler
+ (C) 2022 Taler Systems S.A.
+
+ GNU Taler 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 3, or (at your option) any later version.
+
+ GNU Taler 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
+ GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+/**
+ *
+ * @author Sebastian Javier Marchano (sebasjm)
+ */
+
+import { Fragment, h, VNode } from "preact";
+import { useEffect, useState } from "preact/hooks";
+import { useTranslationContext } from "@gnu-taler/web-util/lib/index.browser";
+import { strings as messages } from "../i18n/strings.js";
+
+type LangsNames = {
+  [P in keyof typeof messages]: string;
+};
+
+const names: LangsNames = {
+  es: "Español [es]",
+  en: "English [en]",
+  fr: "Français [fr]",
+  de: "Deutsch [de]",
+  sv: "Svenska [sv]",
+  it: "Italiano [it]",
+};
+
+function getLangName(s: keyof LangsNames | string): string {
+  if (names[s]) return names[s];
+  return String(s);
+}
+
+// FIXME: explain "like py".
+export function LangSelectorLikePy(): VNode {
+  const [updatingLang, setUpdatingLang] = useState(false);
+  const { lang, changeLanguage } = useTranslationContext();
+  const [hidden, setHidden] = useState(true);
+  useEffect(() => {
+    function bodyKeyPress(event: KeyboardEvent) {
+      if (event.code === "Escape") setHidden(true);
+    }
+    function bodyOnClick(event: Event) {
+      setHidden(true);
+    }
+    document.body.addEventListener("click", bodyOnClick);
+    document.body.addEventListener("keydown", bodyKeyPress as any);
+    return () => {
+      document.body.removeEventListener("keydown", bodyKeyPress as any);
+      document.body.removeEventListener("click", bodyOnClick);
+    };
+  }, []);
+  return (
+    <Fragment>
+      <button
+        name="language"
+        onClick={(ev) => {
+          setHidden((h) => !h);
+          ev.stopPropagation();
+        }}
+      >
+        {getLangName(lang)}
+      </button>
+      <div id="lang" class={hidden ? "hide" : ""}>
+        <div style="position: relative; overflow: visible;">
+          <div
+            class="nav"
+            style="position: absolute; max-height: 60vh; overflow-y: scroll"
+          >
+            {Object.keys(messages)
+              .filter((l) => l !== lang)
+              .map((l) => (
+                <a
+                  key={l}
+                  href="#"
+                  class="navbtn langbtn"
+                  value={l}
+                  onClick={() => {
+                    changeLanguage(l);
+                    setUpdatingLang(false);
+                  }}
+                >
+                  {getLangName(l)}
+                </a>
+              ))}
+            <br />
+          </div>
+        </div>
+      </div>
+    </Fragment>
+  );
+}