Add Visible property to control the visibility

Oqtane.Client/Themes/Controls/LanguageSwitcher.razor

@@ -5,7 +5,7 @@
 @inject ILocalizationService LocalizationService
 @inject NavigationManager NavigationManager
 
-@if (_supportedCultures != null)
+@if (_supportedCultures != null && Visible)
 {
     <div class="btn-group" role="group">
         <button id="btnCultures" type="button" class="btn btn-outline-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
@@ -24,6 +24,9 @@
     private string _selectedCulture;
     private IEnumerable<Culture> _supportedCultures;
 
+    [Parameter]
+    public bool Visible { get; set; } = true;
+
     protected override async Task OnParametersSetAsync()
     {
         var interop = new Interop(JSRuntime);