Pahar topo-maps of Nepal

On the website
there are excellent maps of Nepal. The names of villages, rivers and streams are usefull.
I tried to get into contact with pahar, but did’t get an answer.
Does anybody have information about the copyright rules?

I think copying names of villages from others maps is against the copyright rule of OpenStreetMap as its golden rule is “DON’T COPY FROM OTHER MAPS”.