Homeschooling bilingual Kids

[LUDII]

Have anybody else got experience homeschooling bilingual kids? I'm from Spain and we live in the US, I've been trying a program that was 60% in Spanish and the rest in English but my kids are starting to refuse to answer in Spanish. They are 7 and 9.

I've now switch to 100% in English and we've started doing Spanish online lessons with Diluu https://diluu.com/spanish-classes-for-kids/ so that they get to interact in Spanish with other kids. It's going well, they love it, the lessons are so much fun but I was wondering if once they feel a bit more confident in Spanish we should continue homeschooling in Spanish? They understand pretty much everything but don't feel confortable speaking. I'd love to learn from your experience.