Can a book written in a language that does not use the Latin alphabet be “rare” (not as in hard to obtain) but as in you will not easily encounter them upon entering a book store in the West?

Other than visiting Kinokuniya where they have books written in Mandarin or Japanese that are imported from their country of origin but the prices will be higher (like if a book is ¥1800 in Japan then that would be be inflated to around $29 considering shipping from their end just to put them on their shelves with a very limited number of copies in stock, when it's actually around $11.15)

When you head for mainstream book stores like Barnes & Noble, of course the majority of their library will be in English (same for any country that has their own language when visiting their book store) so if visiting a book store in Japan, even though they have English books (but limited sections) does not mean that they will be an abundance of them in stock, since readers there speak Japanese.

I digress, even though people for the most part remain indifferent about what book he or she is reading at a public space or while commuting, there's a community on either Booktok or Booktube that discuss about them picking up books based off what they saw a stranger near them reading trying to read that book for themselves, but those people are reading books in English, or it could be that they're reading a book that shares their mutual interest.

On the other hand, if I was going to read a book in Japanese at a Western country, again people will remain indifferent about it, but for me personally that ensures it on being more "private" in the sense of being a language barrier since they do not understand what I am reading while at a public place or commuting on the train & bus (EN books are read from L-R while JP books are read from R-L). That would be like if I was reading a book equivalent of 50 Shades but in Japanese.