For individuals aspiring to teach English as a Foreign Language (TEFL), particularly non-native speakers, achieving a high level of English proficiency is paramount. Specifically, one should aim for an English language proficiency equivalent to at least the C1 level on the Common European Framework of Reference for Languages (CEFR). TEFL primarily entails instructing English in regions where it isn't the predominant language, necessitating instructors to possess a profound understanding and mastery of the language.