Cuisine=salvadoran vs cuisine=salvadorean etc

On OSMUS Slack, there is a question about the correct tag for a Salvadoran pupuseria: cuisine=salvadoran | Tags | OpenStreetMap Taginfo is the most common tag, but Tags | OpenStreetMap Taginfo /cuisine=salvadorean and cuisine=salvadorean | Tags | OpenStreetMap Taginfo also exist and it seems that all three are correct in English. Which one is the best?