Again, term "Bitcoin Client" could also mean the software that is being used to access users fund (i get that you're referring to how many Onchain implementation out there)
You also need to look at the whole picture, i can't just change ONCHAIN MAINNET to BITCOIN CLIENT because it will break everything above
Spending Bitcoin
is aldeady being used as titleONCHAIN MAINNET
toBITCOIN CLIENT
because it will break everything above