Hi hijump
Every country has different standards that it requires of overseas trained graduates and there is no one standard. Registration or licensing of physiotherapists in a state of country is a different matter from educational qualification as the former requires takes into account not only the content and quality of education but other aspects which are about protecting the public, such as fitness to practice in an ethical matter (eg no criminal record), tit to practice in terms of health etc. In addition although this is often never overtly discussed but registration and licencing authorities are in the business of controlling who can practice with their borders, and there are often political aspects of this - controlling immigration for example. At worst government and state authorities can behave in a xenophobic manner.
When it comes to educational qualifications I totally agree it would great if we had some form of international accreditation where an educational institution could apply to have its qualification recognised as meeting an internatinal standard. There could always be more than one standard so that different countries could choose the standard required to practice in their state.
Unfortunately I can't see it happening. Even if you could get the leaders in the profession to agree there is this issue of border control.
As for working out if qualifications are equivalent this is actually quite a difficult matter. For example In NZ, Australia, Ireland and Scotland four year bachelors degrees are the entry level degree and these degrees are have a reputation for being of a high standard. England only offers 3 year bachelors degrees for entry level. You have undertaken a four year bachelors degree and are completing a two year doctorate. However is your bachelor's degree of the same standard as ours. A clinical doctorate in Australia would take 3 years to complete. In our country such a doctorate doesn't exist but our masters degrees are two year degrees so would that be equivalent with yours? In the US a DPT is only a three year degree and is an entry level qualification but one completes a basic science bachelors prior to this. So wouldn't your qualification be way ahead of this? And so it goes on. Then there is the academic standing of the university and the school of physiotherapy within it. Not all programmes, even within a country are of anywhere near the same standard.