I suspect this is less about difficulty and more about markets. Simply put, my guess is that there is a decent reliance on google services which are banned in China.
That may deprioritize it, but it is still the third most spoken language in the US[1]. Yes, it is less important than many European languages, but it will still be important even if you completely ignore China.
I was ignoring that for simplicity. Presumably Mandarin, unless otherwise specified, but who knows. My Chinese is pretty rusty, but Cantonese and other dialects were always unintelligible to me even when I could speak decently.
Even if you exclude China, I believe Chinese is still a top-30 language.
That doesn't sound impressive?
We’re all talking about an announcement that Google Assistant is supporting over 30 languages.