I am using the spellchecker and I notice that when I set my browser's language to a language that does not have a dictionary, my web site crashes when I start the spell checker. For now, I've added a couple of appSettings to my web.config file that define a default language and the supported languages, as follows.

<add key="DefaultLanguage" value="en-US"/>
<add key="SupportedLanguages" value="en,fr"/>

Then when I create an instance of my spell checker, I perform the following logic.

string[] langs = WebConfigurationManager.AppSettings["SupportedLanguages"].Split(",".ToCharArray());
bool fLangFound = false;
if (langs.Length > 0)
{
string[] browserLangs = Request.UserLanguages;
foreach(string lang in langs)
{
if (browserLangs[0].ToLower().Contains(lang))
{
fLangFound = true;
break;
}
}
}
if (!fLangFound)
spellChecker.Language = WebConfigurationManager.AppSettings["DefaultLanguage"];

Is there a better way?