public void Set_AddTwoForms_BothAdded()
{
var htmlDom = new HtmlDom();
var data = new BookData(htmlDom, new CollectionSettings(), null);
data.Set("1", "one", "en");
data.Set("1", "uno", "es");
var roundTripData = new BookData(htmlDom, new CollectionSettings(), null);
Assert.AreEqual("one", roundTripData.GetVariableOrNull("1", "en"));
Assert.AreEqual("uno", roundTripData.GetVariableOrNull("1", "es"));
}