PowerStore will most likely always be the closest thing we have to a standalone version of this CafeCommerce. This does not mean that PowerStore 5 will be the same as CafeCommerce at some point, but you will likely see features from CafeCommerce integrated into PowerStore.
The main reason that you PowerStore can't ever be an identical standalone version of CafeCommerce, is because PowerStore has to account for a variety of hosting providers and database setups. We have a lot more flexibility with how we do things in CafeCommerce because we dont have to account for that.
If the demand suggests it, we will work to integrate different languages into CafeCommerce. As it stands right now, the majority of the content can be edited to say what you like. So, someone could translate most of CafeCommerce into a different language if they wanted. However, this doesn't apply to the form fields, so there would still be some text that would be in English.
You can expect CafeCommerce to evolve pretty rapidly, and if demand indicates that there would be a lot of international users, we will jump on the opportunity to support them. We already support multiple currencies (USD, GBP, CAD, AUD, EUR).
Thanks for asking these questions.