How can I translate specific sections of my packing slip?

Hi! I have managed to translate part of my packing slip to french (I can’t even understand why it’s in English when my site’s entire settings are set to french. For now, I’ve gotten to change parts of it via the coding page. What I can’t change is the following:

  1. items
  2. quantity
  3. the date
  4. and the “thank you for shopping with us” at the bottom

Do these land in the store’s variables? How do I translate those parts?