NYU has developed a set of templates to give people an idea of how to structure their popup alert content. The UI now provides a download link for these templates, along with instructions on how to use them.

Here's a video that shows what they look like:
https://drive.google.com/file/d/0BzzUD7FM8Ip5Sm1yRHl4T2RQaVk/view?usp=sharing

I've also had a go at translating the new button + tooltip to Spanish, with the giant disclaimer that I speak zero Spanish and may have had some help from Google