Drupal 8 comes with a concept named content blocks (also referred as custom blocks in the blocks library). These are block types that you can adjust to your needs and then create blocks based on those types. Every block is an entity.
Some time ago I had to implement a configuration form in Drupal to save multilingual variables and after some research I found that the best way to do it is using the variable module alongside i18n_variable (part of i18n).
Assuming you have a web server giving the main content of your site (example.com for this post); but, there's another site hosted in a different web server (different.com/checkthis) and you want that everything inside checkthis folder be served inside example.com (i.e. example.com/checkthis/index.html).
At beginnings of last December I got an offer for LFS course and LFCS certification for under $90; considering its normal price is above $400, that was a really good offer that I couldn’t resist if we also consider that I’m a Linux fanboy.