I am making a computer video tutorial for setting up free open source tool, used worldwide. I assume it would be best to write the transcript in English my only fluent language, and use a machine-translation tool to automatically generate captions for many other languages, until someone volunteers to write up a better caption to replace it. Ideally, I would use (the program running behind the scenes on) one of these two: https://libretranslate.com/ https://beta.apertium.org/ How good are these? Try changing them to a language you know (I understand the selection is limited) and tell me how it turns out. A basic English->Spanish->English seems to work fine on this post, with the first site looking a bit better. Also, if you have any advice for writing sentences which are translated more correctly by a machine, that would be excellent! All I can think of is writing formally, and trying to avoid words with multiple common meanings (e.g. replacing 'check' with 'confirm')