Yandex, the Russia-based search engine, has a handful of free-to-use tools, if you should ever feel the need, including a structured data validator and sitemap checker. You can never have too many tools… Here is a little list of some of them:
I have never used a programming framework seemingly designed to frustrate the development process as much as Magento 2. You have to constantly clear caches and static files to see your modifications, even when in developer mode.
Having recently started work on learning the ropes with Magento 2, and finding all sorts of oddities, incongruities and banging-head-on-desk-ities, I decided to take a look at the blog of Alan Storm at alanstorm.com.
Here is a quick, albeit very hacky solution to allow you to add hreflang tags to a page or item via the XML custom layout box in the admin.