Added korean translation

Author: AlphaKR93

_layouts/default.html

@@ -81,12 +81,12 @@
       line-height: 1.2;
       content: "➤ ";
     }
-    
+
     .li-list::before {
       color: blue;
-      margin-right: 0.5em; 
+      margin-right: 0.5em;
   }
-    
+
     .li-money {
       background-image: url('/img/money_bag.svg');
     }
@@ -124,7 +124,8 @@ <h1>{{ page.title }}</h1>
       <a href="/tr/">Türkçe</a> |
       <a href="/uk/">Українська</a> |
       <a href="/zh-CN/">简体中文</a> |
-      <a href="/zh-TW/">正體中文</a>
+      <a href="/zh-TW/">正體中文</a> |
+      <a href="/ko/">한국어</a>
     </div>
     {{ content }}
   </div>