All of our translation efforts are handled on Transifex (https://www.transifex.com/nodebb/nodebb/), but in general, yes... fixes and incorrect translations would be handled there, and custom changes specific to your community you'd make to those files directly.
Custom page not found
I want to enable facebook login on my forum and Facebook asks for a site policy page for the login app.
Installed custom pages plugin, made a custom page and when I try to acces it I get this error
You seem to have stumbled upon a page that does not exist. Return to the home page.
I don't know what could go wrong and really need the Fb login. In
build/public/templatesI see the files mypage.tpl and mypage.js.