I notice your apostrophe is a backtick. Assuming you're using windows, pressing CTRL and Shift together should cycle through language modes. Do it a couple times and your strange characters should go back to normal.
Yeah, thx for info however this is how it works on the keyboard layout in my country (using your advice would change z to y and make some other mess with my national language).
I could just use the correct key ' or some alt+keypad combination but seriously? I don't
feel this to be a big issue?
To be honest i never knew i am using a wrong button