The spelling of the phrase "Blanch Firmes" can be explained using IPA phonetic transcription. The word "blanch" is pronounced as /blæntʃ/, with the "ch" making a "sh" sound. The second word, "firmes," is pronounced as /fɜːrmz/, with the "e" being pronounced as "er." Together, the phrase is pronounced as /blæntʃ fɜːrmz/. The phrase may also have historical significance, as "blanch firmes" was a feudal payment made to a lord in medieval times.