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Several former colonies retained their former rulers' language due to the enduring influence of colonial powers on education, governance, and administration.
Advantages of retaining the former rulers' language include administrative continuity, access to international trade and diplomacy, and the ability to communicate with a broader global audience.
However, this could also lead to disadvantages like linguistic and cultural imperialism, undermining indigenous languages and cultures, and creating social and economic disparities between those proficient in the colonial language and those who are not.