Every program that I'm making using pygtk is right-alignment by default (maybe because my default language is right to left language?)
How can I change it?
The orientation of the widgets in a container depends on the locale. You can change the locale settings on Windows by setting the LANG environment variable.
set LANG=en_US
something.py
On Linux you can do the same with the following commands
export LANGUAGE=en_US
something.py
or simply
LANGUAGE=en_US something.py