diff --git a/lib/template.html b/lib/template.html
index 8ce8a9e..ab25607 100755
--- a/lib/template.html
+++ b/lib/template.html
@@ -97,7 +97,7 @@
   {% assign seo_page_image = seo_page_image | escape %}
 {% endif %}
 
-{% assign seo_page_locale = page.locale | default: site.locale | default: "en_US"" %}
+{% assign seo_page_locale = page.lang | default: site.lang | default: "en_US"" %}
 
 {% if seo_tag.title and seo_title %}
   <title>{{ seo_title }}</title>
diff --git a/spec/jekyll_seo_tag_spec.rb b/spec/jekyll_seo_tag_spec.rb
index 38a020d..c516d70 100755
--- a/spec/jekyll_seo_tag_spec.rb
+++ b/spec/jekyll_seo_tag_spec.rb
@@ -589,18 +589,18 @@ EOS
       expect(output).to match(expected)
     end
 
-    context "with site.locale" do
-      let(:site)  { make_site("locale" => "en_US") }
+    context "with site.lang" do
+      let(:site)  { make_site("lang" => "en_US") }
       
-      it "uses site.locale if page.locale is not present" do
+      it "uses site.lang if page.lang is not present" do
         expected = %r!<meta property="og:locale" content="en_US" />!
         expect(output).to match(expected)
       end
 
-      context "with page.locale" do
-        let(:page)  { make_page("locale" => "en_UK") }
+      context "with page.lang" do
+        let(:page)  { make_page("lang" => "en_UK") }
 
-        it "uses page.locale if both site.locale and page.locale are present" do
+        it "uses page.lang if both site.lang and page.lang are present" do
           expected = %r!<meta property="og:locale" content="en_UK" />!
           expect(output).to match(expected)
         end