How are node translations handled?

I haven't gotten my project to the point of trying this yet but wanted to see if anyone else is doing this and/or how it is handled...
If you have a multilingual site where we allow content translation to the other languages, how will this work for commerce node checkout? Will it think that there are multiple nodes that have to be "paid for" or will it recognize that the other translations are related to the original node?

This is a concern before I get to that step because it will determine if we can use this module in our architecture. We plan to charge for creating a "listing" but want to allow the listing to be created in English but also allow translation to Spanish, if the visitor wishes to translate it.