Nice to meet you, my name is Senku and I've been here awhile.
I think a typewriter to make is not a problem, but the problem you have then is getting it to work in conjunction with the journal, which is why it hasn't been done. Considering how our messages are transmitted and that's probably some type of magic, you'd have to know how it works exactly to make a typewriter that does exactly what you want.
Unfortunately I only know the mechanical part, the magic is a bit beyond me.
Sender: Senku
I think a typewriter to make is not a problem, but the problem you have then is getting it to work in conjunction with the journal, which is why it hasn't been done. Considering how our messages are transmitted and that's probably some type of magic, you'd have to know how it works exactly to make a typewriter that does exactly what you want.
Unfortunately I only know the mechanical part, the magic is a bit beyond me.