Translating contact forms Is there a way to fully translate the contact message forms in Drupal 8? In the content language screen, the contact message bundle is marked as translation is not supported.  

Edit: To clarify, I would like to translate the fields of the form. As some answers note, the fields can be translated via the regular field translation, but I am running into an issue whereby translations are replaced by the English version when the cache is cleared. By going to /admin/config/regional/content-language and saving the form, the translations are back. 

(Note that the default language on the site is not English.)
I think, content in contact messages is the user input. Then you cannot translate this, because it is not saved to the database. The form itself is config translation, similar to the field definitions in content types.