Here’s an article from WP Mayor written by Lindsay Liedke which I thought you might find of interest.

If you are ready to make your brand internationally known, it is time you start thinking about how to best structure your website so that you can maximize its presence amongst this new audience base.
How you structure your international website in terms of domain architecture is just as important as presenting content in multiple languages for your site visitors.
Today we are going to look at the different ways you can structure your WordPress website to target multiple languages or countries, discuss when to use each method, and examine how using the WPML translation plugin can help your efforts to expand your brand overseas.

To read more head over to WP Mayor

Till next time,
D