Basically, Nepali means in a typical Nepali tone to imply Nepalese people in Nepal or any other parts of the continent.  I  mean in a gorkhez` style.... its just the similar way of expressing Nepalese in English style as others such as China/Chinese, Vietnam/Vietnamese, Burma/Burmese.....

In a simple way we're known as Nepali in a singular form and when we mention many......we say “Nepali-haru” (as plural) which carries the word "Nepalese".  We Nepali never say we are Nepalese in this modern world....however, we just say Nepali where ever we go.. 

I think the word Nepal and Nepali adduce the word "Nepalese"; same as other nationalities like Japan to Japanese.