How fantastic is this now! Google translate now has Nepali too! Well, I don’t know how accurate it will be. Even then, it is great news!
And here is another website to check. It was/is being developed by masters students at Chalmers University here in Gothenburg. They had a Nepali student in the past, who worked on the Nepali grammar coding. I was at one of their presentations and it was very interesting. They use a different method/coding for this than Google Translate. Instead of typing in words, you build your sentences with the choices provided..and these words (choices) are already in a correct grammatical order. You then get the translation of the sentence you’ve build in different languages. The vocabulary for Nepali is limited at the moment but you can try it out here and also report any bugs to them.