Change keyboard letters

the keyboard is most likely manufactured right. the trouble is that your keyboard layout language (ie, US-English) in windows isn't set to the layout of the keyboard you purchased.

you can change the language in windows to match whatever layout your keyboard has.

if however the language in windows is what you want but you want to swap around keys on the keyboard to match this language in windows such as a US-English keyboard that you want to swap to a US-English Dvorak layout then it might be a problem.

everything depends on whether or not your keys actually come off your keyboard. mechanical keyboards all typically support key removal. i'm not sure about all rubber dome switch keyboards but every single one i've dealt with thus far has not had removable keys. if the keys are not removable then you are stuck using whatever layout the keyboard has. well, unless you want to go buy some stickers.

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if you want specific advice it might be helpful to provide:

what brand/make/model keyboard you are using.
if unclear, what language layout the keyboard has.
what your language/layout in windows is set to.
what you are trying to accomplish/change/why.