I am currently discussing with the German moodlers to write/translate a documentation in German for the Algebra and the TeX filter. Is anyone of the English speaking moodlers already working on an English document?
If so, it would be easier for me (and other translaters) to just translate that one.
In the other case it might be better to first collect all information and write a kind of a reference document in English and then to translate from this one into German (and any other language).
I think that the discussion in the forum here and the links Zbigniew has posted earlier would be a good starting point for a docu. Ralph also provided me some links.