See Private Use Area perhaps: * https://en.wikipedia.org/wiki/Private_Use_Areas https://en.wikipedia.org/wiki/Private_Use_Areas On your private site with your

See Private Use Area perhaps: * https://en.wikipedia.org/wiki/Private_Use_Areas https://en.wikipedia.org/wiki/Private_Use_Areas On your private site with your private client you can stuff whatever symbols you want for any particular code point I guess (§ Vendor use).