Hello there,
I am afraid to say I ain't pretty clear what exactly you want to change. If you would like to change the word sqf to Mq , then please go to the following files and change sqft accordingly. It will solve the issue.
1. Find out this code COM_SPPROPERTY_PROPERTIES_SQFT="Sqft" below file
en-GB.com_spproperty.ini
2. Find out this code MOD_SPPROPERTY_PROPERTIES_SQFT="Sqft" below file
en-GB.mod_spproperty_properties.ini
Please check at your end by changing those file names and let us know.
Thanks!