The first meeting of the Spanish Development Society was held in the Rialto Hotel in November, 1974. Town Council approved the Spanish motif December, 1974. The society was incorporated in December 1975. The Spanish theme was created as a vehicle for beautification because the terrain in Osoyoos is similar to that of Spain. It was thought that Osoyoos would benefit from the increased winter tourism experienced by towns such as Leavenworth, Washington. The Spanish theme was incorporated into the municipal hall in 1974 and later into storefronts and homes. The Don Carlos logo was approved in 1976. As fundraisers, the society sponsored the Irish Rovers in 1976, many bingos, and the second World Wrist Wrestling championships in 1977. They erected Spanish themed signage at the
town entrances, and beautified the town hall with a fountain and plaque. The society was disbanded in 2006.