I would stick with Spanish. My oldest took Spanish for 4 years. My middle one is going to be taking his 3rd year of Latin. basically because the Spanish teachers are either ok or really awful at our school while the 1 Latin teacher is really good. The youngest is going with French since we have heard good things about that teacher too. Colleges want to see at least 3 years of 1 language so having your D changing now wouldn’t make any sense. She could always take a year of Latin as a senior if she wants.