On 22. Aug 2019, at 18:17, Wolfgang Schuster <wolfgang.schuster.lists@gmail.com> wrote:

> A PDF with the wrong sorting order doesn't help when you can't show a working minimal example to reproduce the problem.  When you need more control about the sorting order of the index you should switch to MkIV which has more options.
>
> Wolfgang

When ConTeXt MkIV (rather: LuaTeX) supports Indic fonts, I'll gladly do that. :-)