I have a few clients for English who are taking the plunge into proficiency. A C2 proficiency qualification shows the world that you’ve mastered English to an exceptional level. It proves you can communicate with the fluency and sophistication of a highly competent English native speaker.
Although it’s difficult to achieve, fluency can be attained through extended study, a good strategy in place and, usually, with time spent living in full linguistic immersion. Needless to say, you need to be super motivated.
Proficiency is associated with prestige and confidence. Boasting proficient level of English, a professional can negotiate and persuade effectively at senior management level in international business settings. My clients are very ambitious people and even if they are not expected to demonstrate proficiency at work yet they can’t rule out they won’t need to in a while. After all, they are always aspiring for a more senior position. Being fluent in English does tend to make you a stronger job candidate.
Both C1 and C2 speakers can understand with ease virtually everything heard or read. While a speaker of English at level C1 is expected to express him/herself fluently and spontaneously without much obvious searching for expressions, a C2 speaker can express him/herself very fluently and precisely, differentiating finer shades of meaning even in more complex situations. In terms of language, the advanced label can therefore be seen as referring to a speaker who, while very skilled in the use of a language, uses the language with greater formality and less familiarity than a native or fluent speaker.