que significa French-horn en español
How do you say French-horn ins Spanish, it is a musical instrument name in spanish?
This site list an English horn as corno/cuerno inglés so I would think that a French horn would be corno/cuerno francés.
nombre corneta francesa
French horn nf trompa (instrumento musical)
If you look under "corneta" here in our dictionary you will see French horn listed as one of the definitions.
I suppose whether you see it a some kind of trumpet (trompa) or bugle (corneta) is a matter of opinion.