What's the best international URL strategy for my non-profit?

[RSR]

Hi, I have a non-profit organization that advocates for mental health education and treatment. We are considering creating regional chapters of the non-profit in specific countries - France, UK, Russia, etc. What's the best long-term foundation for global organic growth? Should we simply internationalize our content (.org/uk/)? Or create a custom site for each ccTLD (.org.uk, etc.?

Since it's an educational site, the content for each country would not be particularly unique, apart from:

1. Language (regional English nuance for UK and AUS, or other languages altogether)

2. Expert videos and potentially supporting articles (i.e., hosting videos and a supporting article for a UK Doctor versus a US Doctor)

3. Offering some regional context when it comes to treatment options, or navigating school, work, etc.

Any thoughts would be much appreciated!

Thanks!

Aaron