In English, one can use the gender-neutral indefinite pronoun "one", e.g.:
One does not simply walk into Mordor...
In most dialects of modern English, this is rarely used, being replaced by the impersonal "you".
Does a Spanish equivalent of the pronoun "one" exist? As in German man/einer, French on, Catalan hom etc. Or is the only option to use the impersonal se?