Territories where Spanish is spoken are diverse and unique, and they have their own geographical, historical, and socioeconomic characteristics. It is therefore not surprising that in each region they use a different variant of Spanish.
Spanish variants are different in oral form since pronunciation is one of the most distinguishable traits. If you are familiar with the language, you can tell if someone is from Spain, Mexico or Argentina just by listening to them.
In its written form, however, all Spanish variants adhere to the same standards, but differences can mainly be found in:
Region-specific Spanish: There are as many region-specific variants as territories where Spanish is spoken. For example, Mexican Spanish, Cuban Spanish, Chilean Spanish, Castilian Spanish, etc. In this case, the translator is free to use any country-specific linguistic feature.
Well, as everything in localization, it depends. There are two different scenarios: