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Thanks for your answer @Pau PL

Hi Ewerton, I choosed spanish from Spain because I'm from Spain and my clients are from here, and they want better results for Spain than for other countries in Latin America. Some projects with this conditions have ranked well also in many countries in Latin America. In my opinion you should choose the spanish version of the country in which you prefer better positioning, the one you have. And if you want to rank better in other countries you have to get links from those countries. I mean, if you want to rank better in Spain, try to get good quality backlinks of your niche that are from Spain, specially those with .es and also .cat (Catalonia domain), but focus specially on .es domains or .com domains that you see that correspond to spanish people. The same for Mexico but with .mx bakclinks. But with patience, don't build a lot of backlinks together. Best wishes and good luck!!

Great, thanks!