Kathmandude? (6)
I believe the answer is:
nepali
If this is the answer, I'm afraid I cannot explain it.
Can you help me to learn more?
(Other definitions for nepali that I've seen before include "Kathmandu native" , "Language of Kathmandu" , "Native of one Himalayan state" , "Native of a mountainous Hindu kingdom" , "One from Katmandu" .)