It is not their tag, it is the community's tag, and the community has been using that tag for more than a year to filter content written in spanish. People whe are part of the community browse this tag because they want to read content in spanish because they speak spanish and most wont even understand your content let alone vote it, that is the whole purpose of tags, to filter mate. Have a good day, voted your comment but still, i would avoid using the spanish tag, how about using Spain?