IDOC change pointer key filtering

Hi Experts,

I have created a message type ( ymatmas_xxxx ) and activated change pointers for this message type.

So now may requriement is :

If I have activated 10 fields in chanage pointer , so IDOC should trigger only if any of the 10 fields are changed in material master ;

But my problem is;

there should be another filtering done for MAKTX-SPRAS = "E". so that only when description of materail in English language is changed then IDOC should trigger. ( For same material if some other language is triggered then idoc should not trigger )

I have checked customer exit and restricted the MAKTX-spras = 'EN' but what happens is even if other language is changed IDOC is getting triggered for english language; how do SAP know for which language is material description has changed.

Please advice is any other way to overcome this situation