If you go back to link I posted above, the FAA guidance covers this. Paragraph 5-597 E near the top. What they say is if the foreign licence has a medical endorsement on the license then you must have a current foreign medical to use your 61.75. They list several countries that do this, Canada, Germany, Kenya, Singapore, Austria and some others are listed. But if there is no medical endorsement on the license the FAA says a US medical is OK for a 61.75.
Most of this was written before JAR/ EASA so the question is, does EASA put a medical endorsement on your license?