[Plugin: Multisite Language Switcher] Get language of viewed page

Hi,

Is there a function I can call to get the language of the page the user is currently viewing?
For example:
if(msls_get_current_languange() == ‘en_US’) {
// do something
}else {
// do something else
}

Thanks.

http://wordpress.org/extend/plugins/multisite-language-switcher/