fix(html): preserve locale on cloned translators

Co-Authored-By: Virgil <virgil@lethean.io>

context_test.go

@@ -37,6 +37,33 @@ func (t *localeTranslator) Clone() Translator {
 	return &clone
 }
 
+type resettingTranslator struct {
+	language string
+}
+
+func (t *resettingTranslator) T(key string, args ...any) string {
+	if key == "prompt.yes" && t.language == "fr" {
+		return "o"
+	}
+	if key == "prompt.yes" && t.language == "en" {
+		return "y"
+	}
+	return key
+}
+
+func (t *resettingTranslator) SetLanguage(language string) error {
+	t.language = language
+	return nil
+}
+
+func (t *resettingTranslator) Clone() Translator {
+	if t == nil {
+		return (*resettingTranslator)(nil)
+	}
+
+	return &resettingTranslator{}
+}
+
 func TestContext_NewContextWithService_AppliesLocale(t *testing.T) {
 	svc := &localeTranslator{}
 	ctx := NewContextWithService(svc, "fr-FR")
@@ -228,6 +255,25 @@ func TestContext_CloneClonesMutableTranslator(t *testing.T) {
 	}
 }
 
+func TestContext_CloneReappliesLocaleAfterTranslatorClone(t *testing.T) {
+	svc := &resettingTranslator{}
+	ctx := NewContextWithService(svc, "fr-FR")
+
+	clone := ctx.Clone()
+	if clone == nil {
+		t.Fatal("Clone should return a context")
+	}
+	if clone.service == ctx.service {
+		t.Fatal("Clone should duplicate cloneable translators")
+	}
+	if got := Text("prompt.yes").Render(clone); got != "o" {
+		t.Fatalf("Clone should reapply locale after cloning the translator, got %q", got)
+	}
+	if got := clone.Locale; got != "fr-FR" {
+		t.Fatalf("Clone should preserve locale, got %q", got)
+	}
+}
+
 func TestContext_WithDataReturnsClonedContext(t *testing.T) {
 	ctx := NewContext()
 	ctx.SetData("theme", "dark")

translator_clone_default.go

@@ -13,6 +13,7 @@ func cloneTranslator(svc Translator, locale string) Translator {
 
 	if cloner, ok := svc.(translatorCloner); ok && cloner != nil {
 		if clone := cloner.Clone(); clone != nil {
+			applyLocaleToService(clone, locale)
 			return clone
 		}
 	}

translator_clone_js.go

@@ -4,13 +4,14 @@
 
 package html
 
-func cloneTranslator(svc Translator, _ string) Translator {
+func cloneTranslator(svc Translator, locale string) Translator {
 	if svc == nil {
 		return nil
 	}
 
 	if cloner, ok := svc.(translatorCloner); ok && cloner != nil {
 		if clone := cloner.Clone(); clone != nil {
+			applyLocaleToService(clone, locale)
 			return clone
 		}
 	}