Most of those keyboards are programmable, so any accented key can be mapped easily. If you want the keycap legend to match it's more complicated though. But if

Most of those keyboards are programmable, so any accented key can be mapped easily. If you want the keycap legend to match it's more complicated though. But if you touch-type you can be ok with it. I made up my own weird layout (including accented characters for 3 languages), but that's not an issue since I'm ok with fully blank keycaps.