I would like to list all strings within my large python project.
Imagine the different possibilities to create a string in python:
mystring = \"hello
Are you asking about the I18N utilities in Python?
http://docs.python.org/library/gettext.html#internationalizing-your-programs-and-modules
There's a utility called po-utils (formerly xpot) that can help with this.
http://po-utils.progiciels-bpi.ca/README.html