[NTG-context] ck hyphenation in old German orthography

Hi, the sample file aesop-de is in old German orthography, there, ck should get hyphenated as k-k, this doesn’t work (e.g. Mücke isn’t hyphenated at all). Is there something I can configure? Hraban \mainlanguage[deo] \setuplanguage[deo][   hyphenmin=4,   lefthyphenmin=2,   righthyphenmin=2, ] \starttext \hyphenatedfile{aesop-de} \startcolumns Funktioniert die Trennung? Heckeneckenzecken \samplefile{aesop-de} \stopcolumns \stoptext