Pluralizing and singularizing words got very easy with the inclusion of the Doctrine Inflector class in Drupal 8 core.
The task at hand here is to allow the client to create a classed wrapper around multiple elements using CKEditor in Drupal 8.
The fundamental problem here is the CKEditor's built in "Styles" dropdown classes each
<p> individually, while we need a class wrapping them.
You could probably make or install your own CKEditor plugin, but that's not what I did.