University vocabulary in France

Ever since I arrived there, couldn't stop noticing how they try so hard to be 𝓯𝓪𝓷𝓬𝔂 with the vocabulary

There's a class with limited number of people so I say "it's class of 30 people" but everybody says "NUH UH, it's actually 𝓣𝓻𝓪𝓿𝓪𝓾𝔁 𝓭𝓲𝓻𝓲𝓰é𝓼~". It means directed work like wtf-

For optional classes I call it an "option" cause it's how it's called. "NUH UH, you must say 𝓤𝓔2". Complete name Unité d'Enseignement 2 wich translates to "Second Teaching Unit".

When I go to administration using these words they just look and sigh in front of me dude-

Like I was speaking in sumerian to them. When I said "how can i choose the languages ?" THEY DON'T UNDERSTAND THAT SENTENCE. Anybody could understand this-

It's like that kid that tries so hard to be fancy with the vocabulary but we see it's not natural.