Tilde

What IS this thing, this squiggly thing
Curling itself up there
Is it one side of a mustache
Or perhaps an eyebrow hair

No, it’s a revealer of hidden sounds
And turns letters into music
In Spanish it says Y is here
In English we don’t get to use it
In Portguese it lets you know
To talk more through your nose

Oh, it’s the jaunty tilde,
Nuancing sounds where’er it goes