Español Mezclado con Nihongo

There is a new teacher at my visiting school. She teaches Social Studies. She came up to me to introduce herself and asked if I spoke Japanese to which I replied, "chotto." She started telling me that her English was not very good but stopped herself and asked if I spoke Spanish to which I replied, "sí." We then had a conversation in Spanish where she told me she speaks Spanish and has friends from Bolivia that she has lunch with often and so gets to practice her Spanish. It was also during this conversation that I realized I'm going to have a really tough time when I return home and am faced with a situation where I need to speak Spanish as my Spanish has become very mixed up with my Japanese. I had a really hard time speaking to her in Spanish only. I kept throwing in Japanese words here and there. Perhaps it's because it was so discombobulating to speak to a Japanese in Spanish. I hope that's the case. I'll find out when I get home, I suppose.