But to narrow things down...let's start with the assumption, this man was a Swiss (or combined) national.
Going for a long shot......
The deceased was wearing a lot of Portuguese clothing. The number of pieces of clothing could imply that they were purchased in Portugal over a period of time.
Portuguese is also a Latin based language. Italian, spoken in a Swiss canton is also Latin based. Perhaps the deceased is an Italian speaking Swiss who spent time in Portugal due to the related languages? French is also romance based, but Italian, Spanish and Portuguese are "sisters" linguistically. French is more of a "cousin".
Another poster pointed out that his shirt logo had an English spelling /grammar error on it as well as a slightly clumsy, though correct English sentence construction. They then raised the possibility of it being an unlicensed "knock off".
The Azores islands are a self governing part of Portugal in the Atlantic. Perhaps due to the islands self governance, remoteness, island culture etc. the police put copyright enforcement on a very, very low priority? "Knock off" clothing is plentiful in the Azores?
The deceased also likes beaches and associated lifestyles. Thus.....
The Italian speaking Swiss heads to Portugal (easy language to learn for him). Then heads to the Azores for the island vibes and beaches, where he buys some knock off Heineken logo clothing. Beer, and beer logoed clothing just go with islands and beaches.
Wanting to continue his beach lifestyle world tour (well, until her runs out of money and needs to return home), he then heads for United States in general and SOCAL's beaches in particular.