refactor(i18n): extract type checks to check.go

Move isVerbFormObject, isNounFormObject, hasPluralCategories,
isPluralObject to dedicated file.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pkg/i18n/check.go

@@ -0,0 +1,51 @@
+// Package i18n provides internationalization for the CLI.
+package i18n
+
+// isVerbFormObject checks if a map represents verb conjugation forms.
+func isVerbFormObject(m map[string]any) bool {
+	_, hasBase := m["base"]
+	_, hasPast := m["past"]
+	_, hasGerund := m["gerund"]
+	return (hasBase || hasPast || hasGerund) && !isPluralObject(m)
+}
+
+// isNounFormObject checks if a map represents noun forms (with gender).
+// Noun form objects have "gender" field, distinguishing them from CLDR plural objects.
+func isNounFormObject(m map[string]any) bool {
+	_, hasGender := m["gender"]
+	// Only consider it a noun form if it has a gender field
+	// This distinguishes noun forms from CLDR plural objects which use one/other
+	return hasGender
+}
+
+// hasPluralCategories checks if a map has CLDR plural categories beyond one/other.
+func hasPluralCategories(m map[string]any) bool {
+	_, hasZero := m["zero"]
+	_, hasTwo := m["two"]
+	_, hasFew := m["few"]
+	_, hasMany := m["many"]
+	return hasZero || hasTwo || hasFew || hasMany
+}
+
+// isPluralObject checks if a map represents plural forms.
+// Recognizes all CLDR plural categories: zero, one, two, few, many, other.
+func isPluralObject(m map[string]any) bool {
+	_, hasZero := m["zero"]
+	_, hasOne := m["one"]
+	_, hasTwo := m["two"]
+	_, hasFew := m["few"]
+	_, hasMany := m["many"]
+	_, hasOther := m["other"]
+
+	// It's a plural object if it has any plural category key
+	if !hasZero && !hasOne && !hasTwo && !hasFew && !hasMany && !hasOther {
+		return false
+	}
+	// But not if it contains nested objects (those are namespace containers)
+	for _, v := range m {
+		if _, isMap := v.(map[string]any); isMap {
+			return false
+		}
+	}
+	return true
+}

pkg/i18n/i18n.go

@@ -316,55 +316,6 @@ func flattenWithGrammar(prefix string, data map[string]any, out map[string]Messa
 	}
 }
 
-// isVerbFormObject checks if a map represents verb conjugation forms.
-func isVerbFormObject(m map[string]any) bool {
-	_, hasBase := m["base"]
-	_, hasPast := m["past"]
-	_, hasGerund := m["gerund"]
-	return (hasBase || hasPast || hasGerund) && !isPluralObject(m)
-}
-
-// isNounFormObject checks if a map represents noun forms (with gender).
-// Noun form objects have "gender" field, distinguishing them from CLDR plural objects.
-func isNounFormObject(m map[string]any) bool {
-	_, hasGender := m["gender"]
-	// Only consider it a noun form if it has a gender field
-	// This distinguishes noun forms from CLDR plural objects which use one/other
-	return hasGender
-}
-
-// hasPluralCategories checks if a map has CLDR plural categories beyond one/other.
-func hasPluralCategories(m map[string]any) bool {
-	_, hasZero := m["zero"]
-	_, hasTwo := m["two"]
-	_, hasFew := m["few"]
-	_, hasMany := m["many"]
-	return hasZero || hasTwo || hasFew || hasMany
-}
-
-// isPluralObject checks if a map represents plural forms.
-// Recognizes all CLDR plural categories: zero, one, two, few, many, other.
-func isPluralObject(m map[string]any) bool {
-	_, hasZero := m["zero"]
-	_, hasOne := m["one"]
-	_, hasTwo := m["two"]
-	_, hasFew := m["few"]
-	_, hasMany := m["many"]
-	_, hasOther := m["other"]
-
-	// It's a plural object if it has any plural category key
-	if !hasZero && !hasOne && !hasTwo && !hasFew && !hasMany && !hasOther {
-		return false
-	}
-	// But not if it contains nested objects (those are namespace containers)
-	for _, v := range m {
-		if _, isMap := v.(map[string]any); isMap {
-			return false
-		}
-	}
-	return true
-}
-
 func detectLanguage(supported []language.Tag) string {
 	langEnv := os.Getenv("LANG")
 	if langEnv == "" {