I have copied the content of an extension to some private space (below fileadmin), as I always do with most extension where I want to set some changes.
In one viewhelper I have now added the line:
<f:format.raw><f:translate id="EmailSignature"/></f:format.raw>
In the directory fileadmin/.../Resources/Private/Language/ there are files like locallang.xlf and de.locallang.xlf
In general, for this extension, templateRootPath, partialRootPath and layoutRootPath are set and work since some partials I already changed are used.
locallang.xlf now has the entry:
<trans-unit id="EmailSignature" resname="EmailSignature">
<source>my signature</source>
</trans-unit>
and de.locallang.xlf now has the entry:
<trans-unit id="EmailSignature" resname="EmailSignature">
<source></source>
<target>meine Signatur<br>Betreiber:<br></target>
</trans-unit>
But the content of this translation is not shown on the webpage.
If I add the lines to the original logallang.xlf and de.locallang.xlf of the extension (just for testing purposes) - it works.
What do I have to set more to enable the changed language files?
Regards Kallewirsch
For overriding language labels TYPO3 has the _LOCAL_LANG-property in TypoScript: TSref: Top-level objects / plugin
plugin.tx_myext_pi1._LOCAL_LANG.de.EmailSignature = meine Signatur<br>Betreiber:<br>