Formal:
* "Amoxtli" - This is the most formal way to say goodbye, similar to "farewell" in English. It can be used in written or spoken language.
Informal:
* "Nemachi" - This means "I love you" or "I appreciate you" and is used as a way to say goodbye to someone you care about.
* "Moneh" - This is a more casual and informal way to say goodbye, similar to "see you later" in English.
* "Tlahueltiliztli" - This means "thank you" and can be used as a way to say goodbye, especially in a formal setting.
Other options:
* "Xihuitl" - This means "year" and can be used to say goodbye in a way that implies you will see the person again in the future.
* "Axolotl" - This means "water monster" and is a playful way to say goodbye to someone you are close with.
Important note: Nahuatl is a complex language with many dialects. The exact translation of these phrases may vary depending on the region and context.