Languages like Persian(Farsi), Arabic and Hebrew are right-to-left and BiDirectional. 

Talking about BiDi, in english all characters flow from left to right, so this is simple to handle. In a pure Farsi text, all characters are shown from right to left. 

Pure English should be like:
⇨⇨⇨⇨⇨english content⇨⇨⇨⇨⇨

Pure Farsi:
⇦⇦⇦⇦⇦متن فارسی⇦⇦⇦⇦⇦

Farsi and English mixed together should be like:
⇨⇨⇨english content⇨⇨⇦⇦متن فارسی⇦⇦⇦⇨⇨english content⇨⇨⇨

Using current gnome-terminal regularly acts like, which is wrong: 
⇨⇨⇨english content⇨⇨⇨⇨ی‌س‌ر‌ا‌ف‌ ن‌ت‌م⇨⇨⇨⇨⇨english content⇨⇨⇨

This is very annoying specially when you want to edit a simple html page in Farsi using editors like vim.