If English goose and Spanish ganso mean the same thing and look alike, it’s no coincidence. According to the American Heritage Dictionary, Spanish acquired ganso from a Germanic source akin to Old High German gans, a cognate of English goose. The English word used to have an n in it, and still does in the masculine version, gander.
Long after Spanish borrowed ganso from Germanic, the borrowing may have gone the other way. It’s conjectured that the slang English term gonzo ultimately traces back to ganso following the semantic line that allows English to refer to someone as a silly goose. If you’re not familiar with gonzo, the Collins English Dictionary defines it as:
1. wild or crazy
2. (of journalism) explicitly including the writer’s feelings at the time of witnessing the events or undergoing the experiences written about.
© 2017 Steven Schwartzman