How do you make your own programming language in smile BASIC?

Use DEF a lot would be the easiest way to do that thing that you want to do.

Thanks, it worked

I made in Old Petitcom. ACLS ? "Language? A=Japanese B=English WAIT 30:L=-1 REPEAT B=BUTTON() IF B==#A THEN L=0 IF B==#B THEN L=1 UNTIL L!=-1 IF L==0 THEN ? "Nihongo Mihon 1 IF L==1 THEN ? "English Sample 1 A$="Nihongo Mihon 2":IF L THEN A$="English Sample 2 ? A$