i18n.js

translation.js

manual translation

put a translate.json

{ "日本語": "Japanese" }

use class name "ja"

<sometag class="ja">日本語</sometag>

→

<sometag class="ja">Japanese</sometag>

language select

selected by the language setting

<div class="ja_content">日本語</div>
<div class="en_content">English</div>
<style>.en_content { display: none }</style>