I’ve been using the Perl solution for Twitter via Terminal: IRSSI + TWIRSSI for the past couple of days. Amazing. The feeling so nostalgic yet so futuristic; beautiful. However, one problem still stands: Hebrew letters result as gibberish:
Any idea how or where to I can modify the script to work in a readable Hebrew?
Thanks, and G*d bless CLI.

Okay, this is a bit tricky.
The Easy Way
You could simply type in IRSSI:
The Hard Way
If things doesn’t go the easy way, take a look at this.
Install FriBiDi and HebXFonts.
Now, the next part is a kind of an academic guess: It might involve some path altering in the Makefile of HebXFonts.
As for me, I did all of the above until it just worked.
Good luck.