public SpellResult CheckText(string text, Lang[] lang = null, SpellerOptions? options = null, OutputFormat? format = null)
{
RestRequest request = new RestRequest("checkText");
request.AddParameter("text", text);
if (lang != null && lang.Length != 0)
request.AddParameter("lang", string.Join(",", lang.Select(l => l.ToString().ToLowerInvariant())));
if (options.HasValue)
request.AddParameter("options", (int)options.Value);
if (format.HasValue)
request.AddParameter("format", format.Value.ToString().ToLowerInvariant());
return SendRequest<SpellResult>(request);
}