Should I italicize titles not written in the Latin alphabet?
No. Note that there are many languages in the world that do not have an italic font—Japanese, Chinese, Korean, Armenian, for example. Arabic sometimes uses a typeface that slants to the left instead of to the right.
Given the complexity and specificity of historical, cultural, linguistic, and printing practices throughout the world, a writer should not use italics when a book title is in a foreign language that is not written in the Latin alphabet. If you are preparing a work for publication, leave the decision about italicizing such a title to the publisher.