I wonder if there is any modern math books especially calculus that is written in Latin like multivariable calculus, vector calculus etc. Not knowing how modern the get, I'd like to know: What is the most modern (by publication year or style) calculus book written in Latin?
This might be way older that you would like, but at least it is a concrete example. Euler's Introductio in analysin infinitorum from 1748 is a relatively modern calculus book. Euler came up with much of modern calculus notation, so the books before him are probably nowhere near as readable for the modern reader.