i found a way on FH do cut the name-extensions from EXCALIBUR down to a single e .
How to do:
/rpfilter EXCALIBUR e and/or
/rpfilter PRYDWEN p
/rpfilteron ( see your rpfilter-status and list replacements with /rpfilter )
as soon as enabled every EXALIBUR will be replaced with a e.
filteron:
filteroff:
it's working very well on chats but has no effect on killmsgs and others( sadly )