Command Key will only give Math Symbols, not perform regular commands.
someone dumped some heavy papers on my keyboard a couple of days ago and ever since then the Command Key will only display symbols and not perform regular commands. ie. instead of pasting, Command V just gives a square root symbol. Instead of copying, Command C gives a small letter 'c' with a cedilla. In other words, just math symbols. It's very annoying and no aid to productivity. Has anyone got any idea how I can restore the functionality of my Command Key (it doesn't matter what keyboard I attach to my Mac, I get the same problem).
Mac mini, macOS 10.15