I can tell you as a language learner that when I learned langaues, I always focused on having the best pronunciation possible and because of playing guitar, I had a good ear for accents.

if you just speak a foreign language without trying to modify your pronunciation habits, you would just have a strong accent, which is fine.

other people like to try and reduce the accent, it's not 'faking' anything though.

when i speak Russian for example, Russians don't even suspect I'm English and it also doesn't mean I'm a faker. it just means i have worked hard on my accent and speech