English becoming a primary language means that it became widely spoken and used as an official language in many parts of the world due to colonization or other historical reasons.
Related terms
Lingua Franca: A lingua franca is a common language used by people who do not share their native language but need to communicate with each other.
Cultural Assimilation: Cultural assimilation is when one culture adopts or absorbs aspects of another culture over time.
Language Revitalization: Language revitalization refers to efforts made to revive or preserve endangered languages within communities.