Languages (other than English) spoken by students

I am looking for rankings or number of the nationalities and native languages spoken by students (other than English) at English language International Schools. 

I work at Avant Assessment and am thrilled to have the opportunity to support students and schools in making the world a smaller place. Avant is a world leader in the design and delivery of foreign language proficiency assessments and more recently, in the use of e-learning portfolios.  The above information will help greatly with product development.

Thanks!