How do you say are sitting in Malayalam?

The direct translation of "are sitting" in Malayalam would be "irunnu" (ഇരുന്നു).

However, the sentence structure in Malayalam differs from English. To say "They are sitting" you would use:

"avarkaḷ irunnu" (അവർ ഇരുന്നു).

This translates to "they are sitting" in a more natural Malayalam phrasing.