Thank you very much for your informative reply.
I would use different styles in the same document because I am citing references in different languages. I created a new style that fits the other language, for example, if a reference has more than one author, in the Biography section, this character “&” will be used before the last author. In another language, different methods are used.
I need to have both languages in the same document, the solution I am thinking of is to used different styles.
You indicated a much better solution than I was thinking, playing around with reference types. I tried it but unfortunately, the Author Separators (i.e. & and et al) cannot be edited for each reference type.
Again, I do appreciate your help.