diff --git a/tarteaucitron.js b/tarteaucitron.js
index 9a6510e..db9bbcc 100644
--- a/tarteaucitron.js
+++ b/tarteaucitron.js
@@ -1821,8 +1821,8 @@ var tarteaucitron = {
         }
 
         // get the html lang
-        if (availableLanguages.indexOf(document.documentElement.getAttribute("lang")) !== -1) {
-            return document.documentElement.getAttribute("lang");
+        if (availableLanguages.indexOf(document.documentElement.getAttribute("lang").substr(0, 2)) !== -1) {
+          return document.documentElement.getAttribute("lang").substr(0, 2);
         }
 
         if (!navigator) { return defaultLanguage; }
diff --git a/tarteaucitron.services.js b/tarteaucitron.services.js
index 45d941a..96fc34f 100644
--- a/tarteaucitron.services.js
+++ b/tarteaucitron.services.js
@@ -3896,7 +3896,7 @@ tarteaucitron.services.twittertimeline = {
     "js": function () {
         "use strict";
         tarteaucitron.fallback(['tacTwitterTimelines'], '');
-        tarteaucitron.addScript('//platform.twitter.com/widgets.js', 'twitter-wjs');
+        tarteaucitron.addScript('https://platform.twitter.com/widgets.js', 'twitter-wjs');
     },
     "fallback": function () {
         "use strict";