Candidates must be proficient in reading and writing the language of instruction in the proposed country of study.

UNESCO: Sources

Talk of Medicaid, language instruction, demographic charts and border crossing obscures the facts, and debaters on both sides tend to forget that immigrants, even the unskilled, contribute to economic growth.

FORBES: People, Not Lobbies: Immigration And The 1920s

These challenges, which are more acute in rural than in urban areas and are exacerbated by the high levels of poverty among rural families and the predominant use of Spanish as the language of instruction, have created significant barriers which preclude the meaningful participation of indigenous peoples in the public education system.

UNESCO: Bilingual Literacy for Life

And most black children came from poor, ill-educated families where English, the main language of instruction, was not their mother tongue.

ECONOMIST: South Africa's education system