Borges passionate friendship with the young artist Jacobo Sureda Montaner, son of the painter Pilar Montaner, was decisive for Borges writing mainly in Spanish.
Borges' nære venskab med den unge kunstner Jacobo Sureda Montaner, der var søn af maleren Pilar Montaner, var medvirkende til, at Borges hovedsageligt skrev på spansk.