Why do Americans always presume that everyone speaks English

Because gunpowder.

Gunpowder go in metal tube.

Projectile go in metal tube.

Ignite.

BOOM.

Death.

---

Human go new place.

Bring Boomsticks.

Native humans = Dead

Native humans = Surrender

World = Dominated

Language = Spread

Language = Become default

The End

Sadly Ever After

(Fun fact most pilots have to learn Aviation English in order to operate internationally. You can thank the gunpowder for that.)

Edit: Lol Lemmy Shitposts doesn't like a shitpost about the british empire taking over the world.