Same Google +1 button likes count for same page in different languages

Same Google +1 button likes count for same page in different languages

I have a website that is avaliable in two languages, english and portuguese.
The website is configured so that the Google +1 button likes count is the
same no matter what the language the reader is reading the web site, but
this gives me a problem, because I must choose only one URL for the Google
+1 button, which will be in only one of the avaliable languages:
portuguese or english, not both. Examples of the URLs that I use to
configure the Google +1 button URL (href) are below:
Portuguese url: www.website.net/the-page
English url: www.website.net/en/the-page
With this, when the user click on the Google +1 button, she ends up
sharing the page in the language that was configured in the Google +1
button, which may not be in the same language preferred by the user.
To make things clearer, these are currently the possible scenaries of
liking my website with the Google +1 button:
1. Google +1 configured with the english URL version: brazilian users
would share the post/page in english (BAD!), and american users would
share the post in english (OK).
2. Google +1 configured with the portuguese URL version: brazilian users
would share the post/page in portuguese (good), but american users would
share the post in portuguese (not OK).
How can I (if it is possible) make Google +1 button likes count be the
same for both languages and still let the user share the page in his/her
own preferred language?