Here is a template I created for questioning beta readers. These are general questions I developed for my own novel, so they don't cover areas I didn't feel I had problems with. I may, however, return and improve on this template.
How to Use
The questions in the template can be used to brainstorm your own questions, do your first edit, or they can be sent directly to your beta reader through email, Skype, mail, forum, etc.
Use the questions that you feel are most specific to your novel. For instance, asking both if you should have less foreign words and if you should have more is strange. Either you feel it might not have been necessary to include foreign words, or you might be aware that you restricted their usage.
Also, add you own explanations/details to the questions and delete mine as you see fit (I am the parentheses master.).
Enjoy!