Basic app containing around 1000 words
Not totally needed, if your app has separate string files for each language you should only send those files.
Yes, I will translate from Spanish to English too
Yes, the information and any source code will be shared under a NDA
If your Source Code is hosted in a Git Repository of some sort you can give me access to it. OR you can send it compressed in a .zip, .tar.gz, .7z or .rar file.