Why do British people pronounce “Ibiza” as “Ibitha”?
2 Answers By Expert Tutors

Elijah B. answered 03/14/19
Bilingual Spanish Tutor
The "th" pronunciation of the letter "z" is how Spanish speakers in Spain pronounce the letter. So, someone in Spain would refer to the island as "Ibitha," even though they'll still spell it as "Ibizia." This would actually make it the original pronunciation. Considering that Spain and Great Britain are neighbors, they are likely to say it the same way.
In Spanish, the "th" sound is used for the letter "z" mostly in Spain. In North and South America, Spanish speakers usually pronounce the letter the same way as the letter "s." For example, a Latin American Spanish speaker would pronounce "taza" as "ta-sa," while one from Spain would say it as "ta-tha."
Just as someone native to the U.S. would speak English differently than someone born in the U.K., someone born in a Latin American country will speak Spanish differently. This has to do with the fact that languages are constantly changing, and factors such as distance cause different accents.
Whether you pronounce it as one or the other depends on whether you want an accent closer to Latin America Spanish or Spain Spanish. Most people who live in the Americas use Latin American pronunciation.
Judy S. answered 03/14/19
Tutor w/MA for QuickBooks, QuickBooks Online, Computers, basic Excel
Great questions! However, these questions are actually not related to English pronunciation but rather Spanish pronunciation (from Spain). Ibiza is a Spanish island, and the "z" in Castilian Spanish--Spanish spoken in Spain--is pronounced "th." The Brits are simply pronouncing the island the way they have heard the Spanish speaking about their own country.
In English--both British and American--I can't think of a single circumstance when a "z" is ever pronounced with a "th" sound.
Still looking for help? Get the right answer, fast.
Get a free answer to a quick problem.
Most questions answered within 4 hours.
OR
Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.
Geremi S.
In fact original name is Eivissa in Balearic Catalan languatge, so similar how people pronunce it in english. But mainly population in the islands is nowaday tourist and peninsula spaniard that don’t speak a word of catalan. So most popular pronunciation is in english and castillian spanish with ‘z’03/28/20