Looking at the screen shots in https://www.old-computers.com/museum/software_detail.asp?st=..., it doesn’t look bad.

Of course, those are lying. https://www.old-computers.com/museum/computer.asp?st=1&c=100... says “The Interact shipped with 2 joysticks, a built-in tape recorder, a TV RF modulator and 2 KB of ROM”.

So, in real life, those characters were filtered through a NTSC tv signal.

Also, the last comment on https://www.old-computers.com/museum/doc.asp?c=1004 claims “It had no character generator, formin it's large letters from graphic routines.” That seems to imply all characters were drawn procedurally, not from a bitmap font. I find that unlikely. Can that be done in less memory than a generic blitter would use?

There even is a link to emulators on https://www.old-computers.com/museum/emulator.asp?c=1004&st=.... One of them led me to http://dchector.free.fr/link.html, which has a few emulators for (AFAIK) obscure systems such as “Thomson MO5NR, Thomson MO6 & Olivetti Prodest PC128” and http://dchector.free.fr/download/interact_rom.zip, which, presumably, is the ROM for this system.