Content policy: more lax than for questions and answers:
Blogs on Quora are generally unmoderated. Most policies that apply to question-and-answer pages do not apply to blogs. However, there are several rules for blogs and posts:
(The exceptions are spam, and a much higher barrier than BNBR for “niceness”.)
Language policy: Question already asked, with no official reply: What is Quora’s language policy regarding blogs on Quora?
Unresolved, but *probably* English-only, given the wording of Quora’s answer to Does content on Quora need to be written in English?
Quora requires that content on English Quora (quora.com) be written in English.
That’s “content”, not just “questions and answers”.
I have seen a couple of blog posts not in English, but I haven’t gone looking, nor known of instances where Quora requested a blog not in English be taken down. I don’t get the impression Quora moderation is that engaged with blogs to begin with.