\setuplabeltext[de][aufgabe={Aufgabe ,}]\define[1]\TaskCommand{\doifsomething{#1}{: #1}}\definehead[thetask][section]\setuphead[thetask][style=sansbold,bodypartlabel=aufgabe,distance=0pt,deeptextcommand=\TaskCommand]\definecomplexorsimpleempty\task
\def\complextask[#1]{\thetask{#1}}\mainlanguage[de]