What have Europeans tried to solve the problem of so many languages

The Europeans have changed the school curriculums to include more languages other than the native languages in order to solve the problem of so many languages.

Explanation:

The idea of introducing multiple languages in the school curriculum itself in order to address the problem of miscommunication prevalent in Europe due to the existence of so many languages was deemed to be most feasible by the administrations of European countries. Languages like Russian, French, English, Spanish, German, etc. are currently a part of the European school curriculums other than the native languages of the countries.