質問: how do you say “ are you ill?” は 日本語 で何と言いますか? how do you say “ are you ill?” は 日本語 で何と言いますか?
回答: 気分(きぶん)が悪い(わるい)の? 具合(ぐあい)が悪い(わるい)の? those are very natural and casual expressions.