トピ主さんにあてはまるか分かりませんが、知人がカナダの移民弁護士に下のように要求されたそうです。知人のnative language は英語です。
Although your native language is English, Citizenship and Immigration Canada does require proof of your English proficiency. Please prepare a statement, handwritten in English,confirming your English language ability, including your educationalbackground in addition to the use of the English language in your employment.