Hi @AbdifatahAl082, welcome to the community! Instructors can teach a course in any language they like! The platform is localized in German, English, Spanish, French, Italian, Japanese, Korean, Portuguese, Russian, Turkish, Dutch, Polish and Chinese, but you are welcome to create a course in any language.
Changing the course language will affect how your course is discovered on the Udemy, and your course will appear with other courses taught in the same language. For more information, please check out our Support Center articlehere.