Hi @lcmartinezru,
There are two “primary locale” settings at play – the one for the journal, which it sounds like you’re using Spanish; and the one for the article itself, which it sounds like some authors are choosing English for and others are using Spanish.
The CrossRef plugin should be using the article’s primary locale as the language for deposit. If the English is getting deposited, it’s because the journal permits the author to select the article’s language, and the author has chosen English on the first step of the submission process.
Can you confirm that this sounds like what’s happening in your situation?
For what it’s worth, you can control whether or not authors can choose languages, and which ones they’re allowed to use, on the journal’s Languages setup area.
Regards,
Alec Smecher
Public Knowledge Project Team