International validation framework (being able to get the country validator depending on the locale session, and validate specific rules accordingly, e.g address, ssn/sin, postal code, …)
Login in registered country only (added registeredCountry attribute in customerModel so that we can check in the custom authentication provider extending the accelerator one – which originates from spring security – the coherence between registereredCountry and locale session country).
Role base security, specific business permissions depending on group, and navigation nodes generated depending on retrictions assigned the the matching pages.
International catalogs creation – one for each country, with the type store containing a product catalog and supported currency.
Ask me for more information on features above, this was a personal experience at ThePamperedChef.