Code switching or "professionalism"???

Do you know that when you are at work/school/university or in another "professional" environment, that you suddenly speak differently.

You control your posture and body language, the volume at which you speak and even the words you use... and when you find yourself among " peers " again, that tension eases and you become yourself again.

Do you know how psychologically, emotionally and physically exhausting it is to mask your "real" personality to "fit in"? Day after day, playing a "role" so as not to be labeled as "too noisy", "too aggressive", "too foreign", "too African", etc., and to be able to fit in with society? Some people laugh at this and say: Oh, it can't be that bad... YOU are exaggerating, etc. But try to put yourself in our shoes. Don't you think that some people can develop a multiple personality disorder? How can you fully develop as a human being if you are taught from a young age in certain environments (not to say in a predominantly "white" establishment etc.) to behave in a way that doesn't fit your native culture/education.

But I wonder who was/is the unit of measurement here...? ??

How do you deal with this? Do you find it easy to change or do you not care and stay true to yourself and your true self even in the above mentioned settings?