gn should not be one of the language choices

If you pick Guarani as the language to translate to you get an error on the api side that gn is not a valid language.  It should be removed until the backend supports it.

<img width="425" height="526" alt="Image" src="https://github.com/user-attachments/assets/e187200d-e8d0-4c95-abd8-ddd7b893cedd" />