Actually, my aunt speaks to her in Spanish at times, and French as well. She had spent 20+ years of her career in Spanish speaking countries and it is practically 2nd nature to her. In July the 2 of them went to a Japanese Art Deco exhibit at the John Ringling Museum and my aunt was duly impressed by how much my daughter was able to translate.
Grandpa makes sure they know what a trebouchet is, why it is important, and can rebuild the model that I gave them. That set, at least is getting a good education.
The other poor grandkids are in California. Lord help 'em.