I have been reading HN for a while and never commented, but the translation thing is very close to my heart, what with learning Physics both in Polish and English at different stages of my life.
It uses Wikipedia's APIs to "click the language links" for you. It also displays short summaries of both languages' articles, so the translation can be verified. I know I'm a small sample, but I end up using it reasonably often.
So much so that I've made a dedicated tool for this: https://wikitranslator.github.io/
It uses Wikipedia's APIs to "click the language links" for you. It also displays short summaries of both languages' articles, so the translation can be verified. I know I'm a small sample, but I end up using it reasonably often.