If you are already an Amazon (US) affiliate, is there an expedited method to sign-up with Amazon (UK), Amazon (Canada), Amazon (Germany), Amazon (France), etc? Do you have to create a separate account (along with a separate Tracking ID) for each country's site? Is it worth it? In the case of the non-English speaking sites, I looked at them via Google translation, but the sign-up process was unclear.
Yes, you have to register separately for each locale, there's no expedited method. Probably worth it if you planning your sites on country domains - co.uk, ca, de, fr, jp and local languages. Except for UK and CA I have very few visitors on my DE and FR site, probably because I can't speak or write their language as well.