Searching "salomas español" in Google brings up only 1 result:
https://www.naosantamaria.org/es/blog/cr%C3%B3nica-de-luis-barqu%C3%ADn-n20 - article appears to be about a Spanish shanty group but doesn't say if they actually perform in Spanish -- given the dearth of information on the subject, I'd assume they sang in English, but I could be wrong. Unfortunately, the article doesn't give the name of the Spanish shanty group.
Searching "salomas españolas" (proper conjugation) gives 3 links but they are all dead.