I just came from a PT program in Australia. Each country has it's own requirements. I know for Canada, you would need to get your coursework approved by a credentialing service and then sit the exam there. I'm pretty sure you would need to do the same for AUS. Also, you would need to get a work visa or at least a temporary resident visa, both requiring the fulfillment of points on a checklist. I'm originally from California and barely made the requirements, even though I completed my entire degree and lived there for 3 years. There are also sponsorship opportunities in Aus that can help with the visa/residency requirements too. I know they're hard-pressed for healthcare workers in the rural/remote areas (ie. the outback). Check the government websites. As for Europe, it depends on where you go. I know most countries where English is not their first language (France, Italy, Spain are the ones I looked at) required you to be proficient in their language, as well as a passing score on their exam. You pretty much need to check out the government sites for each country. Countries in the EU may have some agreement that allows you to travel and work between them. Not sure. And some places may only require that you're licensed somewhere in the world. I know, for example, there's an Australian-run clinic in the ski fields of Japan that accepts Australian licensing and does not have a language requirement. It's just a matter of time-consuming research.
Hope I helped a little bit