Babysitter Needed for my Children

My husband and I are looking for someone who could be with us in a part-time capacity, ideally long-term, to help with our two daughters (6 and 9), from about 3 p.m. - 7pm, Mondays - Thursdays. Responsibilities could include helping make snack and dinner prep, helping with drop-offs/pick-ups, possibly running errands, and (very importantly) being comfortable only speaking to us, or at least our daughters, in Spanish. We used to have Spanish speaking au pairs, and we are really missing having the constant language exposure in the home.