If you want to change the emails that are send out by Woocommerce, you have several options. It depends a bit on what you exactly want.

If it’s more like a word that needs to be changed.
So could be that the translation in your languages is not correct and/or your prefer to use another word instead.

  1. Individual WORD level
    Using Loco Translate, you can change / override specific words.
    How to do this can be found here:
    https://localise.biz/wordpress/plugin/custom-translations
  2. More structural template level
    If it’s more like on the template level, you can take the existing template and copy (keep the same name) them to a Child Theme or a plugin. So the WordPress website will first look over there before looking at the default Woocommerce templates.
    See also https://docs.woocommerce.com/document/template-structure/
    Warning: tech skills are adviced.