Thinking source: http://www.akimiyamoto.com/sag/ Translate are having a many issues. In WordPress, maybe standards are using [*.pot]file and [*.po]file, [*.mo]. But creating are many steps and times. Source site are translated. But both ( English, Japanese ) contents are includes to same article. So easy. Idea: It’s includes to WordPress plugin. Maybe change by 2 ( … more? ) TAB, default is main l