these are the sounds found in most native Nepali dialects:
there are also sounds not on the chart

Other sounds:
a labio-velar central approximant [w]
aspirated counterparts of all stops
retroflex flap as allophone of retroflex /d/
nasalized counterparts of all vowels except /o/

(from: Acharya, J. 1991. A Descriptive Grammar of Nepali and Analyzed Corpus. Washington, DC: Georgetown University Press.
Rev. Turnbull, A. 1982. Nepali Grammar and Vocabulary. New Delhi: Asian Educational Services.)