this is a start for #29

src/css/common.css

@@ -43,6 +43,13 @@
     display: inline-block;
     }
 
+html {
+    direction: ltr;
+    }
+html.rtl {
+    direction: rtl;
+    }
+
 /* http://stackoverflow.com/questions/2011142/how-to-change-the-style-of-title-attribute-inside-the-anchor-tag?answertab=votes */
 *[data-tip] {
     position: relative;

src/js/i18n.js

@@ -23,6 +23,16 @@
 // jQuery must be present at this point.
 
 window.addEventListener('load', function() {
+    // http://en.wikipedia.org/wiki/Right-to-left
+    var rtlLanguages = {
+        'ar': true,
+        'fa': true,
+        'he': true
+    };
+    if ( rtlLanguages[navigator.language] ) {
+        uDom('html').addClass('rtl');
+    }
+
     var nodeList = document.querySelectorAll('[data-i18n]');
     var i = nodeList.length;
     var node;