Redirect to a specific page/URL when there is no translation for a post

[ampuEus]

I have seen that if a post does not exist in a specific language user is redirected to the post of the default_lang on _config.yml.

If the post does not exist on default_lang, it seems that another translation is chosen, but it does not follow the order of the languages array on _config.yml. I am correct?

Is there a possibility of going to a specific page that says that the translation in that language does not exist?