diff --git a/js/common/view/AutoHearControl.ts b/js/common/view/AutoHearControl.ts
index 3179419..4d716a6 100644
--- a/js/common/view/AutoHearControl.ts
+++ b/js/common/view/AutoHearControl.ts
@@ -36,7 +36,7 @@ export default class AutoHearControl extends Node {
     speechSynthesisAnnouncer: NumberSuiteCommonSpeechSynthesisAnnouncer,
     labelStringProperty: TReadOnlyProperty<string>,
     descriptionStringProperty: TReadOnlyProperty<string>,
-    visible: boolean
+    visible = true
   ) {
 
     super( {
diff --git a/js/common/view/SecondLanguageControl.ts b/js/common/view/SecondLanguageControl.ts
index 39c9f3d..6bde44d 100644
--- a/js/common/view/SecondLanguageControl.ts
+++ b/js/common/view/SecondLanguageControl.ts
@@ -28,7 +28,7 @@ import Property from '../../../../axon/js/Property.js';
 type SelfOptions = EmptySelfOptions;
 type SecondLanguageControlOptions = SelfOptions & StrictOmit<VBoxOptions, 'children'>;
 
-type SecondLanguageProperties = {
+export type SecondLanguageProperties = {
   showSecondLocaleProperty: Property<boolean>;
   isPrimaryLocaleProperty: Property<boolean>;
   secondLocaleProperty: LocaleProperty;