I’ll address two common i18n problems that users of current mainstream browsers face. Users should get content from multilingual Web sites automatically in a language they understand, hence they need a way to tell their preferences. Some browsers give users this option, but others don't. I'll demonstrate live if and how languages can be set in various browsers and discuss the usability issue that browser vendors have to deal with: the trade-off between functionality and a simple user interface. Users should also be able to enter email addresses with international domain names into forms. That might not be possible in modern browsers that already support HTML5's new email input type. I'll show how to validate email addresses not being too restrictive and eventually raise the question: Does the HTML5 specification have to be changed to reflect the users' needs? Author´s presentation is available online at