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I would try to go with these HREFLang tags, if your environment and structure is set up right for this I'm of the view that this will really help new countries where you'll launch as you have the 'ability' to direct some of your authority their way via these tags. You have something similar for your sitemaps, where you can also point at the different languages for one page. Besides that I would put all my money and efforts on promoting your content and building up an authority in every single country.