The Readability plugin will help you to identify issues with your website content, especially with readability.

It allows you to measure the readability of text using common scoring systems, including:

• Flesch Kincaid Reading Ease
• Flesch Kincaid Grade Level
• Gunning Fog Score
• Coleman Liau Index
• SMOG Index
• Automated Reability Index
• Dale-Chall Readability Score
• Spache Readability Score

This plugin is based off the Text Statistics library.