We have a similar issue (Belgium has 3 official languages - Dutch, French and German (Dutch and French are the main languages spoken)).
I prefer that when I follow a Google+ company/brandpage, I don't want to see updates from that company/brand in a non-native language of myself. Therefore at the moment, we create a Dutch Google+ page AND a seperate French Google+ page. At the moment Google+ isn't able to segment updates to country or language, so seperate pages for different countries and languages would be a current best practice imo.
Facebook had a similar approach at first but changed that approach which means you can segment Facebook company/brand updates to specific languages. Fans of your page who's setttings are in dutch, will only see the dutch updates the page publishes and fans who's settings are set to french, will only see the french updates.
I would think that Google+ will eventually evolve into something similar and therefore multiple Google+ pages for different languages will become obsolete. The question is when? When Google decides to add this functionality, many Google+ pages will have to get merged together or deleted.
Using Circles is one way of dealing with this problem. But for us, it is very difficult to determine if a person's main language is either french or dutch. Other solutions are always welcome!
