Language selection from URL parameter

We have implemented a nopCommerce store in both English and French. When users come to our site from a referring site (we have control over the URL there), it would be very desirable to automatically give them pages in their language rather than the default language (English) set for the store.

As an example, if people where on site xyz.fr which is French and they were to click on our URL (www.minimaestroweb.com), it would be very desirable for them to see our pages in French rather than in the default language (English).

Any ideas as to how to implement such a function within the nopCommerce framework? I suspect that we would need to pass a language parameter with the URL.

https://www.nopcommerce.com/boards/t/6414/automatic-match-the-language-in-nop-to-the-visitors-browser-set-languages.aspx

The above should work. I have code in which you can push the language too but first try to implement this.