How to change 2 or more letters in full caps into opentype all small caps

[MPBOOKS]

I am looking for a script that can identify two or more consecutive letters in full caps, and replace the full sequence/acronym with Opentype All Small Caps - e.g. FIFA, PA, USA. My usual font is Sabon LT Pro and I would like to be able to specify this or other fonts in the script. Can anyone advise?

[rob day]

Hi @MPBOOKS , You should be able to do it with a GREP Find/Change or a GREP Style in a Paragraph Style—this would get more than 2 and less than 11, and change to a Character Style set to Open Type All Small Caps