Hack will be easy. See here. The support is right there, its just not officially supported by Nokia, and you need to enable it yourself by editting a config file. I think you will be able to change the device language to Czech either right out of the box or by downloading Czech language support. I surely hope I can change the device language from Dutch to English even though I buy the device in Netherlands. And in the past, that was possible. It is possible with my Nokia E71 too. Just need to download the software for it. So for that I wouldn't worry. As for the Czech hardware keyboard, judging from the reply you got Nokia will value user feedback after the device is released. So you cannot influence the manufacturing of the Czech hardware keyboard for N900 right now. I have SU-8W, it worked on N8x0 too. I quite like it because its foldable and portable.