Is there a sort method that can be specified for register sorts that will ignore unicode quote marks (“‘’”) in the same way that primes ("') are ignored. This was asked in 2010 (http://www.mail-archive.com/ntg-context@ntg.nl/msg51348.html) and not answered. It is still a problem.

Is there a sort method that can be applied as well to sorted lists to do this?
\definesorting[Sort][Sorts]
\starttext
\placelistofSorts[criterium=all]
\placeindex[n=1,method=default]
\index{"Hope" is the thing with feathers}
\index{Hope is the thing with feathers}
\index{Hop is the thing with feathers}
\index{“Hope” is the thing with feathers}
\Sort["Hope" is]{"Hope" is the thing with feathers}
\Sort[“Hope” is]{“Hope” is the thing with feathers}
\Sort[Hope is]{Hope is the thing with feathers}
\Sort[Hop is]{Hop is the thing with feathers}
\Sort[Dope is]{Dope is the thing with feathers}
\Sort[Rope is]{Rope is the thing with feathers}
\stoptext

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Rik