Vostra madre è in casa?

English Translation

Is your mother at home?

it’s unclear if “your” is singular or plural. “tua” and “vostra” should both be accepted, maybe even “sua”

This is possibly the polite/formal version?

Such things happen often. It is unavoidable due to the simplicity of English grammar.
If you feel really sure about other correct answers you can add them on your own (using the “pen icon”) or add a hint, like “plural”.
All that will affect only your personal database.

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