diff --git a/_layouts/post.html b/_layouts/post.html
index f6474d6..6b19162 100644
--- a/_layouts/post.html
+++ b/_layouts/post.html
@@ -1,7 +1,7 @@
 ---
 layout: default
 ---
-<div class='post {% if page.fa %}fa-post{% endif %}'>
+<div class='post lang-{% if page.lang %}{{ page.lang }}{% else %}en{% endif %}'>
 
   <div class="post-header">
     <h1 class="post-title">{{ page.title }}</h1>
diff --git a/_sass/_layout.scss b/_sass/_layout.scss
index 1470dae..dad9d99 100644
--- a/_sass/_layout.scss
+++ b/_sass/_layout.scss
@@ -127,7 +127,7 @@ strong {
   }
 }
 
-.fa-post {
+.lang-fa {
   font-family: $base-font-family;
   direction: rtl !important;
   .post-content {
diff --git a/index.html b/index.html
index 6f34a43..564fb0e 100644
--- a/index.html
+++ b/index.html
@@ -6,7 +6,7 @@ layout: default
 
   <ul class="post-list">
     {% for post in site.posts %}
-      <li class='{% if post.fa %}fa-post{% endif %}'>
+      <li class='lang-{% if post.lang %}{{ post.lang }}{% else %}en{% endif %}'>
         <h2>
           <a class="post-link" href="{{ post.url | prepend: site.baseurl }}">{{ post.title }}</a>