Dora La Exploradora Doblaje Xavier Free -

Another angle: maybe the user is talking about a parody or a fan version of Dora the Explorer where Xavier, a Spanish speaker, added his voice for fun without any cost. That's possible. Alternatively, it could be a misunderstanding in the translation, where "free" isn't meaning no cost but something else, like a specific dub (like "Dub Español Libre") or a new dub made freely available online.