diff --git a/CHANGES.rst b/CHANGES.rst
index 83097a4f1..f8d6fcfce 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -39,6 +39,10 @@ Bug fixes:
 - Tinymce: Fix issue where Webpack less-loader was unable to load TinyMCE bundle styles
   [datakurre]
 
+- Fix for loading country specific language codes
+  [lyralemos]
+
+
 2.7.2 (2018-04-08)
 ------------------
 
diff --git a/mockup/js/i18n.js b/mockup/js/i18n.js
index 0f60d351c..bb2d338fc 100644
--- a/mockup/js/i18n.js
+++ b/mockup/js/i18n.js
@@ -19,6 +19,12 @@ define([
       self.baseUrl = '/plonejsi18n';
     }
     self.currentLanguage = $('html').attr('lang') || 'en-us';
+
+    // Fix for country specific languages
+    if (self.currentLanguage.split('-').length > 1) {
+      self.currentLanguage = self.currentLanguage.split('-')[0] + '_' + self.currentLanguage.split('-')[1].toUpperCase();
+    }
+
     self.storage = null;
     self.catalogs = {};
     self.ttl = 24 * 3600 * 1000;