Bug 867985 - update number of locales

We went from 89 to 80 locales. Amending the text to "over 70" and "more than 90%" is vague enough to be accurate for the foreseeable future even as the specific number fluctuates.
Merge pull request #863 from craigcook/bug-867985-update-15-facts

Bug 867985 - update number of locales