\mainlanguage[sv]

\setupbodyfont[12pt]

\defineitemgroup
  [fooditems]

\setupitemgroup
  [fooditems]
  [each]
  [none,text]
  [textseparator=,]

\starttext

\startfooditems
    \item fish
    \item eggs
    \item milk
\stopfooditems

\stoptext