accept-charset
                                                    Specifies the acceptable character sets for entities returned in the response or events associated with this request.
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                                                                     Value  | 
                                                                
                                                                     UTF-8, UTF-16, ISO-8859-1. Values are case-sensitive. Use dashes when specifying in an MRCP header. Use underscores when specifying in session.xml. If this parameter is not specified, any character set is acceptable. DEFAULT: (none)  | 
                                                            
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                                                                     How to set  | 
                                                                
                                                                     In the browser, using the Accept-Charset header in a RECOGNIZE method. For the recognizer—In the application’s session.xml, in the <speechrecog> section of <speechserver> under <sessionparameters>.  | 
                                                            
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                                                                     Usage  | 
                                                                
                                                                     Frequently used. Applicable for Nuance Recognizer. Not applicable for Dragon Voice recognition.  | 
                                                            
Speech Server converts the result into the charset specified in the Accept-Charset header. This is useful in specifying the character set to use in the results of a RECOGNITION-COMPLETE event.