The article does give an example of how it works in Spanish. There is an audio sample linked of the sentence 'En todo el mundo hay hombres que hablan silbando'

The article does give an example of how it works in Spanish. There is an audio sample linked of the sentence 'En todo el mundo hay hombres que hablan silbando' being whistled. https://soundcloud.com/bbc_com/entodoelmundo https://soundcloud.com/bbc_com/entodoelmundo