Iberoés (Ibérico oeste), Portunhol/Portuñol, or West Iberian is a fictional language that, if existing, could allow for more than 812 million speakers to understand and communicate with each other, rivaling or even surpassing English as the major global language.

The flag intends to represent the three kingdoms which contributed to the beginnings of the language: Kingdom of Galicia, Kingdom of Portugal, and Kingdom of Castilla y León. Portugal is represented as a blue cross on a white field, the first flag to represent Portugal. Galicia is represented as half a blue saltire on a white background, referencing the current Galician flag

. Castille & León is represented by a quartering of red, representing Castille, and white, representing León.