Update README.md

Author: roblarsen

src/translations/_template/README.md

@@ -108,6 +108,7 @@ permalink: /translations/************/index.html
 * Can you give an example of a pseudo class? Can you provide an example use case for a pseudo class? 
 * What is the difference between a block level element and an inline element. Can you provide examples of each type of element?
 * What is the difference between CSS Grid and Flexbox? When would you use one over the other?
+* What is the difference between fixed, fluid and responsive layouts?
 
 #### [[⬆]](#toc) <a name='js'>JS Questions:</a>