feat: add comprehensive inflection patterns for English nouns

- Add -se/-ses pattern (impulses → impulse, responses → response)
- Add Latin -um/-a plurals (datum/data, medium/media, spectrum/spectra)
- Add Greek -on/-a plurals (criterion/criteria, phenomenon/phenomena)
- Add extended -f/-ves patterns (wolf/wolves, scarf/scarves, leaf/leaves)
- Add French -eau/-eaux plurals (bureau/bureaux, tableau/tableaux)
- Add improved quiz/quizzes pattern
- Add comprehensive test coverage for all new patterns
- All 69 specs passing

Author: watzon

spec/inflector/noun_inflector_spec.cr

@@ -108,6 +108,53 @@ describe Cadmium::NounInflector do
       subject.singularize("antennas").should eq("antenna")
       subject.singularize("formulas").should eq("formula")
     end
+
+    it "should handle -SES to -SE cases" do
+      subject.singularize("impulses").should eq("impulse")
+      subject.singularize("responses").should eq("response")
+      subject.singularize("licenses").should eq("license")
+      subject.singularize("verses").should eq("verse")
+      subject.singularize("courses").should eq("course")
+    end
+
+    it "should handle Latin -A to -UM cases" do
+      subject.singularize("data").should eq("datum")
+      subject.singularize("media").should eq("medium")
+      subject.singularize("curricula").should eq("curriculum")
+      subject.singularize("memoranda").should eq("memorandum")
+      subject.singularize("bacteria").should eq("bacterium")
+      subject.singularize("errata").should eq("erratum")
+      subject.singularize("ova").should eq("ovum")
+      subject.singularize("agenda").should eq("agendum")
+      subject.singularize("referenda").should eq("referendum")
+      subject.singularize("spectra").should eq("spectrum")
+      subject.singularize("strata").should eq("stratum")
+    end
+
+    it "should handle Greek -A to -ON cases" do
+      subject.singularize("criteria").should eq("criterion")
+      subject.singularize("phenomena").should eq("phenomenon")
+      subject.singularize("automata").should eq("automaton")
+    end
+
+    it "should handle extended -VES to -F cases" do
+      subject.singularize("wolves").should eq("wolf")
+      subject.singularize("calves").should eq("calf")
+      subject.singularize("scarves").should eq("scarf")
+      subject.singularize("leaves").should eq("leaf")
+      subject.singularize("hooves").should eq("hoof")
+    end
+
+    it "should handle French -EAU to -EAUX cases" do
+      subject.singularize("bureaux").should eq("bureau")
+      subject.singularize("tableaux").should eq("tableau")
+      subject.singularize("chateaux").should eq("chateau")
+      subject.singularize("plateaux").should eq("plateau")
+    end
+
+    it "should handle QUIZ cases" do
+      subject.singularize("quizzes").should eq("quiz")
+    end
   end
 
   describe "#pluralize" do
@@ -153,7 +200,6 @@ describe Cadmium::NounInflector do
       subject.pluralize("church").should eq("churches")
       subject.pluralize("appendix").should eq("appendixes")
       subject.pluralize("mess").should eq("messes")
-      subject.pluralize("quiz").should eq("quizes")
       subject.pluralize("shoe").should eq("shoes")
     end
 
@@ -220,5 +266,44 @@ describe Cadmium::NounInflector do
       subject.pluralize("vertebra").should eq("vertebrae")
       subject.pluralize("vita").should eq("vitae")
     end
+
+    it "should handle Latin -UM to -A cases" do
+      subject.pluralize("datum").should eq("data")
+      subject.pluralize("medium").should eq("media")
+      subject.pluralize("curriculum").should eq("curricula")
+      subject.pluralize("memorandum").should eq("memoranda")
+      subject.pluralize("bacterium").should eq("bacteria")
+      subject.pluralize("erratum").should eq("errata")
+      subject.pluralize("ovum").should eq("ova")
+      subject.pluralize("agendum").should eq("agenda")
+      subject.pluralize("referendum").should eq("referenda")
+      subject.pluralize("spectrum").should eq("spectra")
+      subject.pluralize("stratum").should eq("strata")
+    end
+
+    it "should handle Greek -ON to -A cases" do
+      subject.pluralize("criterion").should eq("criteria")
+      subject.pluralize("phenomenon").should eq("phenomena")
+      subject.pluralize("automaton").should eq("automata")
+    end
+
+    it "should handle extended -F to -VES cases" do
+      subject.pluralize("wolf").should eq("wolves")
+      subject.pluralize("calf").should eq("calves")
+      subject.pluralize("scarf").should eq("scarves")
+      subject.pluralize("leaf").should eq("leaves")
+      subject.pluralize("hoof").should eq("hooves")
+    end
+
+    it "should handle French -EAU to -EAUX cases" do
+      subject.pluralize("bureau").should eq("bureaux")
+      subject.pluralize("tableau").should eq("tableaux")
+      subject.pluralize("chateau").should eq("chateaux")
+      subject.pluralize("plateau").should eq("plateaux")
+    end
+
+    it "should handle QUIZ cases" do
+      subject.pluralize("quiz").should eq("quizzes")
+    end
   end
 end

src/cadmium/inflector/noun_inflector.cr

@@ -31,26 +31,39 @@ module Cadmium
       add_irregular("cloth", "clothes")
       add_irregular("hero", "heroes")
 
-      plural_forms.regular_forms.push({/y$/i, "ies"})
-      plural_forms.regular_forms.push({/ife$/i, "ives"})
+      # Most specific patterns first - order matters!
+      plural_forms.regular_forms.push({/([^v])y$/i, "\\1ies"})
+      plural_forms.regular_forms.push({/(criteri|phenomen|automat)on$/i, "\\1a"})
+      plural_forms.regular_forms.push({/(curricul|dat|medi|memorand|bacteri|errat|ov|agend|referend|spectr|strat)um$/i, "\\1a"})
       plural_forms.regular_forms.push({/(antenn|formul|nebul|vertebr|vit)a$/i, "\\1ae"})
+      plural_forms.regular_forms.push({/([aeiou]l|ar|ea|oo)f$/i, "\\1ves"})
+      plural_forms.regular_forms.push({/ife$/i, "ives"})
       plural_forms.regular_forms.push({/(octop|vir|radi|nucle|fung|cact|stimul)us$/i, "\\1i"})
       plural_forms.regular_forms.push({/(buffal|tomat|tornad)o$/i, "\\1oes"})
+      plural_forms.regular_forms.push({/(quiz)$/i, "\\1zes"})
       plural_forms.regular_forms.push({/(sis)$/i, "ses"})
       plural_forms.regular_forms.push({/(matr|vert|ind|cort)(ix|ex)$/i, "\\1ices"})
+      plural_forms.regular_forms.push({/(bureau|tableau|chateau|plateau)$/i, "\\1x"})
       plural_forms.regular_forms.push({/sses$/i, "sses"})
       plural_forms.regular_forms.push({/(x|ch|ss|sh|s|z)$/i, "\\1es"})
       plural_forms.regular_forms.push({/^(?!talis|.*hu)(.*)man$/i, "\\1men"})
       plural_forms.regular_forms.push({/(.*)/i, "\\1s"})
 
+      # Most specific patterns first - order matters!
+      singular_forms.regular_forms.push({/(.*[^us])ses$/i, "\\1se"})
       singular_forms.regular_forms.push({/([^v])ies$/i, "\\1y"})
-      singular_forms.regular_forms.push({/ives$/i, "ife"})
+      singular_forms.regular_forms.push({/(criteri|phenomen|automat)a$/i, "\\1on"})
+      singular_forms.regular_forms.push({/(curricul|dat|medi|memorand|bacteri|errat|ov|agend|referend|spectr|strat)a$/i, "\\1um"})
       singular_forms.regular_forms.push({/(antenn|formul|nebul|vertebr|vit)ae$/i, "\\1a"})
+      singular_forms.regular_forms.push({/([aeiou]l|ar|ea|oo)ves$/i, "\\1f"})
+      singular_forms.regular_forms.push({/ives$/i, "ife"})
       singular_forms.regular_forms.push({/(octop|vir|radi|nucle|fung|cact|stimul)(i)$/i, "\\1us"})
       singular_forms.regular_forms.push({/(buffal|tomat|tornad)(oes)$/i, "\\1o"})
+      singular_forms.regular_forms.push({/(quiz)zes$/i, "\\1"})
       singular_forms.regular_forms.push({/(analy|naly|synop|parenthe|diagno|the)ses$/i, "\\1sis"})
       singular_forms.regular_forms.push({/(vert|ind|cort)(ices)$/i, "\\1ex"})
       singular_forms.regular_forms.push({/(matr|append)(ices)$/i, "\\1ix"})
+      singular_forms.regular_forms.push({/(bureau|tableau|chateau|plateau)x$/i, "\\1"})
       singular_forms.regular_forms.push({/(x|ch|ss|sh|s|z)es$/i, "\\1"})
       singular_forms.regular_forms.push({/men$/i, "man"})
       singular_forms.regular_forms.push({/ss$/i, "ss"})