[TYPO3-dev] Fluid Template: translate ViewHelper doesn't work w/o extension path

[Dirk Wenzel]

Hi all,
recently I took over an extension written by another company.

There the translation ViewHelper doesn't work as expected.
Keys will only be found if the complete path is given:

{f:translate(key: 
'LLL:EXT:ext_name/Resources/Private/Language/locallang.xml:translated_key')}

Using
{f:translate(key: 'translated_key')}

doesn't work.

Since the file resides in the right place and is well formed I have no 
clue what could be wrong.

Any hints?

Kind regards
Dirk