"Who is the woman?"
Translation:Quis est femina?
Word order does matter. "Free" word order is a misnomer. It's merely relatively flexible.
The general tendency for declarative statements is SOV (Subject Object Verb). However, "esse/to be" is the copula and by definition does not take an object but rather a subject complement. The general tendency in those sentences is SVC (Subject Verb Copula).
Additionally, regardless of the verb type, the much stronger tendency for questions is to have the verb appear much sooner in the sentence.
It should also be accepted now, but unfortunately it takes some time for the changes we make in the Incubator to be active for users (sometimes as long as two weeks).
Still, please report (with the button in the lesson, not in the discussion) if it's not accepted, it's still possible something got missed!
Latin word order is relatively flexible. The typical order is SOV (Subject Object Verb), but that's not super rigid.
However, verbs like "esse/to be" are stative verbs, not active verbs, and as such they take complements, not objects. In this case, the typical order is SVC (Subject Verb Complement) in order to better differentiate between the subject and the complement when both are entirely in the nominative. But again, that's not super rigid.
On top of that, the order for questions is different from the order for statements. Typically, the verb comes first or second in questions: Quis est femina? Estne pater in Italia? This does tend to be followed more closely.
You're thinking of the relative pronoun. This is the interrogative pronoun.