Multi-languages support

Hello,

I’m currently working on a multi-languages website and I use you plugin. But I haven’ found the option to enable multi-language support. Does it exists ?

If not, it will be amazing. It could be as a setting like [... lang=FR ...] or based with navigator language (like Paypal page).

Thanks,

https://wordpress.org/plugins/wordpress-simple-paypal-shopping-cart/