Force English language in all Google services.This small extension solves Google language auto-detection problem which causes troubles for people who want their content in English no matter where they are.
Here is a discussion about the particular issue of Google services:
http://productforums.google.com/forum/?hl=en#!msg/chrome/NFQGOS4kM3k/8H7twZQLnTkJ
Permission to access data on *.google.com is required only for getting URL and rewriting it with hl=en, which forces English language. You can always view the full source code of this extension here:
https://github.com/spajus/english-please