[Aerroon]

TV, radio, and newspaper ads are also local. They do not have international reach. Would ads be useful to you in Russian or Chinese? Would the company paying for the ads find it useful that you get those ads? No, they wouldn't, but on the internet without data everyone would get all of the ads.

[labawi]

You don't need to snoop on your visitors to choose a language. Choosing an ad based on browser preferred language or geoip is not behavioral advertising. It is behavioral advertising when you record the data, when you track the user and show your ad on a site with the lowest bid instead of the relevant site that your target audience originally visited.

You don't need the persons purchasing history, sex, marital status, age, ethnicity, interests, political orientation, a list of visited sites and all data you can get your hands on, to choose a language.