i18n.go

@@ -55,6 +55,18 @@ func CurrentLanguage() string {
 	return "en"
 }
 
+// AvailableLanguages returns the loaded language tags on the default service.
+func AvailableLanguages() []string {
+	if svc := Default(); svc != nil {
+		langs := svc.AvailableLanguages()
+		if len(langs) == 0 {
+			return nil
+		}
+		return append([]string(nil), langs...)
+	}
+	return nil
+}
+
 // SetMode sets the translation mode for the default service.
 func SetMode(m Mode) {
 	if svc := Default(); svc != nil {

i18n_test.go

@@ -119,6 +119,24 @@ func TestCurrentLanguage_Good(t *testing.T) {
 	assert.NotEmpty(t, lang)
 }
 
+func TestAvailableLanguages_Good(t *testing.T) {
+	prev := Default()
+	t.Cleanup(func() {
+		SetDefault(prev)
+	})
+
+	svc, err := New()
+	require.NoError(t, err)
+	SetDefault(svc)
+
+	langs := AvailableLanguages()
+	require.NotEmpty(t, langs)
+	assert.Equal(t, svc.AvailableLanguages(), langs)
+
+	langs[0] = "zz"
+	assert.NotEqual(t, "zz", svc.AvailableLanguages()[0])
+}
+
 // --- SetMode / CurrentMode ---
 
 func TestSetMode_Good(t *testing.T) {