The Formula w/o Checkbox
replaceAll(prop("Name"), "[abcdefghigklmnopqrstuvwxyz]", "")
The Breakdown
replaceAll(prop("Name"),
โ Replace all characters in Name property ...
"[abcdefghigklmnopqrstuvwxyz]",
โ that consist of lowercase letters ...
"")
โ with empty space.
The Formula w/ Checkbox
(prop("Acronym?") == true) ? replaceAll(prop("Name"), "[abcdefghigklmnopqrstuvwxyz]", "") : ""
โ if Acronym property is true, then follow above formula.