This is just a report for you. We can see the link icons at the bottom of our lesson page. One of the icons is LingQCentral日本 with Japanese flag. This link works and we can go to the page of
Most of the menu icons on this page doesn’t work properly. When I click ホーム or どうしてLingQなの or サポート or 料金, the error message is shown. And when I click メンバーの声, I go to Testimonial in English (not Japanese).
I reported this bug to WestEnder about a month ago by e-mail. It hasn’t fixed yet. When you have time, please check it.