Incidentally, it is written in NiklausWirth's Modula-2 language. Pretty rare to find these days...
Like most AmigaDos? products, it include ARexx integration, which gives you a powerful RexxLanguage MacroLanguage.
Apparently, it is now freely available:
Author: Martin Taillefer
Homepage: http://www.monkeyhouse.eclipse.co.uk/amiga/turbotext/
License: Freeware
Screenshot: