Vostro 5581 keyboard replacement

Hello

I had to buy a Vostro 5581 while traveling in a French speaking country when my main computer died. So, this 5581 has a French keyboard. I purchased a replacement English keyboard from EBay, but when I came to open the 5581 to try and switch keyboards, I found this...

https://www.dell.com/support/manuals/en-uk/vostro-15-5581-laptop/Vostro_5581_SM/Removing-the-palmrest-and-keyboard-assembly?guid=GUID-252BD939-8285-4948-8FD5-F25CC32B907C&lang=en-us

The keyboard is buried under a metal plate that is permanently fixed to the plastic base with melted plastic nubs. It seems impossible to remove that plate without breaking all those plastic nubs. Am I missing something, or is this truly as awful a design as it seems to be? What would Dell techs do if I sent this computer in under warranty to replace a faulty keyboard?

Thanks,
BP