ad.html: specify English language

_includes/ad.html

@@ -1,4 +1,5 @@
 <detect-missing-adblocker>
+<div lang="en">
 <noscript><hr></noscript>
 <noscript><p class="centered"><strong><em>Dear JavaScript blocker, please accept my apologies for needlessly showing you this:</em></strong></p></noscript>
 <span slot="title" class="centered"><p>Dear reader, you may be missing a content blocker! 🙀</p></span>
@@ -13,4 +14,5 @@ Allowlist</a>) <strong>together</strong>, while <a href="https://adnauseam.io">A
 <p><small>PS. I am sorry if you are already protected and this silly <a href="https://easylist.to/">EasyList</a> targeting(?) script doesn't detect that, thank you for taking the steps towards a safer internet! 💜</small></p>
 </span>
 <noscript><hr></noscript>
+</div>
 </detect-missing-adblocker>