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diff --git a/public/vale/.vale-styles/Readability/FleschKincaid.yml b/public/vale/.vale-styles/Readability/FleschKincaid.yml
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+++ b/public/vale/.vale-styles/Readability/FleschKincaid.yml
@@ -0,0 +1,8 @@
+extends: metric
+message: "Try to keep the Flesch–Kincaid grade level (%s) below 8."
+link: https://en.wikipedia.org/wiki/Flesch%E2%80%93Kincaid_readability_tests
+
+formula: |
+ (0.39 * (words / sentences)) + (11.8 * (syllables / words)) - 15.59
+
+condition: "> 8"