You could use "página". That's "page" in Spanish:

https://input.mozilla.org/en-US/?q=p%C3%A1gina&locale=es-ES&date_end=2013-11-14&date_start=2013-11-07&product=Firefox&version=25.0.0

If you nix the product_filters (I'm not sure why we need to select a specific Firefox version for this test if it's just testing searches with unicode), then that'd definitely work.

38 instances isn't a ton, but