The Mx stems in you board will take any key cap with mounting cross; but legends will not match your language layout, nor some keys like left shift, ISO enter that ANSI and ISO layout do not share in terms of sizes. In your board could be 1u modifiers that the standard ANSI has in 1.25u standard. While most alphas could be used, you will have to choose a different setting for the keyboard layout configuration, because you will have legends that do not match your current configuration.
Welcome to GH by the way.
I suppose your keyboard is similar to this: