switch reference in Rioplatense Spanish

Rioplatense Spanish has no switch reference system. No suffix, pronoun or connective states that the subject of a subordinate clause is the same as, or different from, the subject of the clause it depends on, and where the identity matters a speaker relies on the agreement suffix, on an overt pronoun, or on the context. One candidate might have qualified and does not. The choice between an infinitival complement and a finite dependent one is sensitive to subject identity, so quiero salir can be understood with one subject only and quiero que salgas requires two. That alternation follows from the fact that an infinitive carries no agreement of its own and takes its subject from the main clause, so it is a consequence of how the complement is built rather than a marking of the relation between two subjects, and it is unavailable in most of the contexts where the relation might need stating. Marking of this kind is required even where the identity is already unambiguous, and nothing in this language is.