You should change:
You Died! -> Game over!
In minecraft beta, the death screen used to say "Game over" instead of "You Died!"

Sorry for the wait! Finally getting the inspiration to work through these issues. I also included the title screen button text from Beta 1.7.3 (Title Screen vs Title menu)

en_us.zip
Here's an edited en_us.json file I made from the one included in Golden Days.
Feel free to add this to the pack if you want, @PoeticRainbow