Eh, Spanish has the same issues across the pond and everyone adapts quickly.

Móvil/Celular -cell phone-

Camarero/Mesero -waiter-

Tiroteo/Balacera -shooting-

Nevera/Heladera -freezer-

Cacahuete/Maní -peanut-

Coche/Carro -car- (In Iberian Spanish carro it's a old carriage)

Ordenador/Computadora (Computador was used in Ib. Spa. long ago maybe in 1960's and 1970's). And -computación (computing) it's used on formal, academical contexts, such as papers for the university.

Of course a formally written book will be understood everywhere, and the older, the better.