Hello @ldezem and welcome to the forum. Please provide some details, so that others can help you. It's not clear if you have exactly the same problem and in which CryptPad app you experienced the problem, but mainly there's no clue which OS and Browser you use. Screenshot also help, like the original poster HollyHoller did. ;-)
Regarding your keyboard layout that should not be the cause, because the suggested solution to press the control key of the OS ("ctrl" for Windows, "command" for MacOS) is usually independent of the language, the control key is the same in all keyboard layouts.