Pen is spanish

"Pen" has multiple meanings:

Writing Instrument

Pluma (feather/fountain pen - but used as a generic term for the writing instrument)

Bolígrafo (ball point pen)

To write (Pen a story)

Escribir (Write)

An enclosure (animal pen)

Corral

pocilga (Sty - Pigpen)

To confine an animal (pen the animals)

encerrar (Enclose)

acorralar (put into a corral) also - encorralar