this depends is you consider first language only or first and second language.
both are inaccurate to be honest.
18% of the global population are first language or second language speaker of english,
and 95% of published journals are in English
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by the way, me myself, my native tongue is Malay but I speak in Enligsh most of the time. my master degree class is in english, when intreat patients i used the English and when i post on social media I use English