[TYPO3-mvc] Fluid variable in key of translate viewhelper?

[Tobias Liegl]

Hi,

is it possible to use a variable in the key of the translate viewhelper? 
Something like this?

<f:translate key="tx_myext.month.{month}" />

{month} is 01 or 02 in my case and tx_myext.month.01 is defined as 
January in the locallang file. But unluckily it doesn't work.

Tobi