For example, you’d use “le” or “les” within a word or separate to use as a pronoun. To clarify pronouns you need to say who you’re talking to, previously, or after “le” or “les”
• Les digo (a ellos / a ellas) que no. (Plural)
I say [to them] no.
• Le (a él/ a ella / a usted) digo que sí. (Singular)
I say [to him / her / you ] yes.