International SEO bridges the gap between global attention and your business. Master the ropes of international SEO in this complete guide.| Linkody's Blog
In the post What is a valid Hreflang? I covered how hreflang markup is to be used and what language and region codes are valid. It's a good, succinct list of valid codes. This page has more information because it includes the names of countries and languages that are represented by the various codes. For| Hreflang Testing Tool | Hreflang implementation guide and testing tool