[TYPO3-translators] Not all files are available for translation

[Tymoteusz Motylewski]

Hello
I wanted to add polish add translation for extension commerce, but found 
out that not all files are available for translation.
You can see the difference when comparing to e.g. German language.
See http://translation.typo3.org/de/TYPO3.TYPO3.ext.commerce/
and http://translation.typo3.org/pl/TYPO3.TYPO3.ext.commerce/ 
<http://translation.typo3.org/de/TYPO3.TYPO3.ext.commerce/>

What should I do to see all files ?
Thanks
Tymek