You know you're a language nerd when…

[Deinonysus]

Your book: "You don't need to memorize this."
You: "I'm going to memorize this."

[Ccaesar]

The struggle of explaining to someone that this is a pleasure that takes work and isn't encoded in your DNA

[kelvin921019]

Me to a friend: Have you heard about (certain news), I read it on el país
Friend: It's on local news yesterday, why you have to read it on el país?
Me: because I want to?

[Cavesa]

When you get excited to see a Playstation ad that's basically a screen of moving kanji, and then disappointed. It's just an ad for a new rpg set in Japan, not a new and revolutionary learning tool on that platform.

[sanjiu27]

When you realize, speaking with other people, that it is not normal at all to become interested in weird and relatively unknown languages from [put here some remote place of the world, such as Siberia]

[JLS]

Me: "Hey, I'm gonna make my own language!"

My wife: "Just another day..."

[jeff_lindqvist]

...it's time for the first closing announcement at work and you decide to do it in Spanish (after Swedish and English).
-Cerramos dentro de treinta minutos. (Yep, that was it.)
Half an hour later, one of the co-workers shows up with two tourists, and points in my direction.
Girl: -Are you the guy who made that announcement? I thought you were Spanish! (Glancing at the Polyglot Gathering t-shirt) Now I see that...you are a polyglot! He's a polyglot too! (pointing to her companion)
Guy nods and confirms: -Poligloto.

[mick33]

I was at a park with my mom and a niece and nephew. A woman jogs past us speaking into her phone in another language.
Mom: "What language was she speaking?"
Me: "No idea, I didn't hear enough of it.

Now I'm hoping to cross paths with this woman again and try to figure out what language it was, but I doubt this will happen.

[Cavesa]

When a movie without subtitles suddenly shows a supervillain meeting, where people speak several languages, and you don't miss the subtitles at all (I even got the basics of what the German villain was talking about)!

[golyplot]

When you spend half of the Phantom Bullet arc in Sword Art Online frustrated at the characters for not realizing that "sterben" means "to die". Then at the very end when the nurse finally clues them in, you get frustrated that she explains it as "a fancy medical term for death", rather than just a common, everyday word.