It's somewhat difficult to "ask for it" in a way that's accessible for a large number of people. Either way, you're presuming something that may or may not be true.

It's safest to handle the main use case, that is, people using the most prevalent language of the region, and implement a language chooser for everyone else.

> you're presuming something that may or may not be true

What's that? I'm presuming that there's more than one language available, but so does the initial example.

I mean no matter what you do, you're defaulting to a language that the user of your site may not speak.

I don't consider it "unsafe", or problematic in any way, that http://en.wikipedia.org/ gets you English wikipedia even if you access it from a German IP, whereas http://de.wikipedia.org/ gets you German wikipedia even if you access it from an Australian IP. There are plenty of websites that will not give you the page you request no matter what you ask for, if they think you should be going to a different page. That's idiotic.