I use multiple languages with libreoffice. I have genome ubuntu 12.04 installed. When i change the keyboard layout from English to Pashto or Persian the standard font is changed to Lohit Hindi. This font does not support many of the characters in Pashto and/or has problems with some the characters.
How do I change the settings so that when when I press (alt+shift) to change the keyboard layout the font changes to a pre-specified font like Bahij Nassim or Arial rather than Lohit Hindi.