I want to write English subtitles for the only documentary about the original Russian mathematician Grigori Perelman, who proved the Poincaré conjecture and then refused a million dollar prize. I am going to translate it from Russian to English. But I need help with editing. There are no math terms in the documentary, it is for laymen. I need help to make my English sound natural.
PS: I know that it is a question/answer site. But I suppose one of the site's purposes is also to encourage collaboration between mathematicians in popularizing mathematics.