Is there a way to replace from original string to translated string in .po file

Question

I want to switch the string from translated string in .po file to original string in source file.

i.e:

in en.po

#: hello.py:100
msgid "안녕"
msgstr "hello"

in hello.py

...
print(_(u'안녕'))
....

something --pofile en.po --source [directory in hello.py] --destination [directory for hello_replaced.py]

it will be :

in hello_replaced.py

...
print(_(u'hello'))
...

Is there any useful tool?