Sorry my head is not stable right now I think.
1. Spiranthes sinensis comes in both hairy and non hairy forms. It can be both pink or white. If you look at the lower surface of the flowers in this, except for the front of the lip where it is curved, the part towards the base is flat. In S.himalayensis is is slightly swollen.
2. I do think someone from Nepal reported Spiranthes hongkongensis.
3. There is also Spiranthes himalayensis found in Nepal.
4. Spiranthes spiralis paper from Nepal has a drawing which is so @#$@ that I cant make out anything.
Your plant somehow looks close to S. himalayensis. It has a kind of pouch like swollen part near the base of the flower on the lower side which is not so evident in S. hongkongensis or sinensis.
Pankaj