There's actually a book on this topic from the guy who did Dothraki for the GoT show. Haven't read it yet though I did buy it at some point. (no affiliate link)

There's actually a book on this topic from the guy who did Dothraki for the GoT show. Haven't read it yet though I did buy it at some point. (no affiliate link) https://www.amazon.com/Art-Language-Invention-Horse-Lords-World-Building-ebook/dp/B00TY3ZMVG/ https://www.amazon.com/Art-Language-Invention-Horse-Lords-Wo...