My keyboard on my computer keeps switching to using symbols as I'm typing.

My keyboard on my computer keeps switching to using symbols as I'm typing. I've gone through and changed/reset/etc the keyboard, text, and language settings. I've tried to figure out if a key is stuck, but couldn't find one. I've disabled function keys to check if that affects anything, it does not. The keys will eventually, spontaneously switch back to normal (with or without my troubleshooting). It keeps switching back and forth without rhyme or reason. I eventually linked a wireless keyboard, which types correctly- even when my computer keyboard does not- so I figure it must be a technical malfunction of somekind. Using this other keyboard permanently would be fine, except it is not my own and I am traveling abroad while working from my computer.

Please help guide me to a solution!

Thanks!