Can you spot a bug?

private List<string> GetLanguages(string path)

{

    var languages = new List<string>();

    if(File.Exists(path))

    {

        using(var reader = new StreamReader(path,_encoding))

        {

            var dscReader = new DscReader(reader);

            while(dscReader.Read())

            {

                string language = dscReader.Item.Language;

                if (!string.IsNullOrEmpty(language) && !language.Contains(language))

                    languages.Add(language);

            }

        }

    }

    return languages;

}