My friend is using a German keyboard on his MBP. He is thinking about buying a wired Apple English keyboard and exchange all the key caps with the MBP and then

My friend is using a German keyboard on his MBP. He is thinking about buying a wired Apple English keyboard and exchange all the key caps with the MBP and then use English keyboard. Not sure if this will work, but then the keys will be white instead of the default black ...