> English doesn’t really have a verb for “think” with the connotation that the belief is false.
How does yiwei/creerse differ from "Juan doubts that they are going to promote him"?
How does yiwei/creerse differ from "Juan doubts that they are going to promote him"?
In the "doubts" case, Juan believes that they are not going to promote him. There is no assertion regarding the truth value of that belief.
Juan does not doubt, the speaker does.
Note that creerse is creer+se.