It has the irritating technique of presenting me all the headers in German, even though my browser’s preferred language is English. I would prefer English, German is OK too, but there are plenty of people in Germany who would rather read English or who don’t even understand German. It’s possible to register, so possibly that would help.
LATER REMARK: it seems I was too hasty, as so often. This time it gave me English headings, and there are flags at the bottom of the page so you can choose the language. I take it all back (but don’t know how to do strikeout – I would leave my earlier text there, but crossed out).