[TYPO3] same locallang for different pi's

[Lars Haendler]

Hi,

while working on a new extension with different pi's I realized that 
each pi has its own locallang.xml file. Is there a way to use only on 
locallang.xml - say from pi1 - for all pi's?

Is there a standard locallang file that is accessible for all 
extensions? I mean where standard phases like "Are you sure?", "Yes", 
"No" or whatsoever can be found?

Regards
Lars