I'm pretty sure it is. This seems to suggest most people speak english: "Nearly 43% of California residents speak a language other than English at home, a propo

I'm pretty sure it is. This seems to suggest most people speak english: "Nearly 43% of California residents speak a language other than English at home, a proportion far higher than any other state." [0] https://en.wikipedia.org/wiki/Demographics_of_California https://en.wikipedia.org/wiki/Demographics_of_California