How to spell out the result of plural UI escape sequences?

[LudiusMaximus]

Hi, how can I get the interpreted version of a string including plural UI escape sequences?

local pluralString = "2 |4car:cars;"
-- Do something with pluralString such that the result is what would be printed.
local interpretedPluralString = ???
assert(interpretedPluralString == "2 cars")

Thanks in advance!