[NTG-context] Context index and sorting question

Hi all, I am currently working on a dictionary with multiple indices of older language stages like, Old English, Old Norse, Greec, Sanskrit, Hittite, etc. Most of these languages have different characters, accents and sorting rules than English. In enco-ini.tex I found the \definesortkey command, but it is not entirely clear to me how I could use this command for the individual indices instead of for the overall language (in my case english). Or even if this is possible at all? Could someone tell me how I can use the \definesortkey command or for that matter any other ConTeXt mechanism to define sortrules for individual indices? Regards Sjoerd PS why does Texutil strip accents \' \~ \` \" \^ but not \= ?