Hi . I read the post you highlighted and commented. I think your attitude and passion for helping people who are in the terrible situation of homelessness is fantastic and we look forward to reading your entry to the Project Giving community challenge. I think in regards to the problem of most people you speak to not speaking English, if you provide a translation even with google translate, next to the text in the native langue or if it is a video provide a brief translation of what they have said then that will be fine. It is more important to convey how these issues effect the people you speak to/film than perfect English etc. I hope this helps with your planning.
RE: Introducing Project Giving's Community Challenge