Can I assign a different style for each category?

I apologize for that.

“Author separates”  that I meant are " &, and, et al", which can be found under the “Auther list”.

I want to change theses separators to another language for some references, not all references. I tried that by

  • using two styles in one document
  • using different references types

but with no success.

Any help would be greatly appreciated!