Board Game Arena

As the title suggests: why is the tutorial in an Asian language (I can't tell if it's Chinese, Japanese, or something else)? The game interface is translated correctly (into Italian, in my case), but none of the tutorial windows (after the initial introductory screen, which is translated into Italian) are.

There already is a bug report about this: https://boardgamearena.com/bug?id=250995 You may vote for it.

It's not clear if this is a technical error, or if the tutorial was originally written in Chinese. I have asked the author QQMilkTea about this, but they haven't been online since then.