In general first language taught in schools is mother language or main language of business in the geography where one is studying. The second language is the major international language (or a national language if the first language is the international language) so that it can be helpful in the future with respect to the business or communication.
The concept of having two languages is to provide two option to the kids which are the most important two languages for the person to thrive.
Diploma in elementary education
"A Dictionary of the English Language", first published in 1755, becoming one of the most influential dictionaries in the history of the English language, was by whom?