Does anyone know a time in history where language played a huge role in creating a great effect on something else?

Question

For example, the Navajo speakers in WW2 decoding and encoding their native language supporting the Americans so they won't be intercepted or understood by the enemy (very advantageous).

Answer 1

Choctaw code talkers, too --
https://www.choctawnation.com/history-culture/people/code-talkers

Martin Luther & his 95 theses --
https://www.history.com/topics/reformation/martin-luther-and-the-95-theses

What else can you think of?