After NFD Hangul syllables are processed normally.

lib/twitter_cldr/collation/collator.rb

@@ -58,16 +58,10 @@ def fractional_element(integer_code_points)
           integer_code_points.shift(offset)
           fractional_elements
         else
-          hangul_fractional_elements(integer_code_points) || [implicit_fractional_element(integer_code_points.shift)]
+          [implicit_fractional_element(integer_code_points.shift)]
         end
       end
 
-      def hangul_fractional_elements(code_points)
-        return unless TwitterCldr::Normalizers::Hangul.hangul_syllable?(code_points.first)
-
-        get_fractional_elements(TwitterCldr::Normalizers::Hangul.decompose(code_points.shift))
-      end
-
       # Generates implicit weights for all code_points. Uses the approach described in
       # http://source.icu-project.org/repos/icu/icuhtml/trunk/design/collation/ICU_collation_design.htm#Implicit_CEs
       # but produces a single fractional collation element without any continuation.