Fluid, access locallang.xlf from another extension

Question

I have a own template and in this template I overwrite the templates of the tx_news:

plugin.tx_news.view {

    templateRootPaths.1 = EXT:my_template/Resources/Private/News/Templates/
    partialRootPaths.1  = EXT:my_template/Resources/Private/News/Partials/
    layoutRootPaths.1 = EXT:my_template/Resources/Private/News/Layouts/
}

Now I would like to access the locallang.xlf from my_template. I tried this in the ext_table.php of my_template:

\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addLLrefForTCAdescr(
    'tt_content.pi_flexform.news_pi1.list', 'EXT:my_template/Resources/Private/Language/locallang.xlf');

And in this locallang.xlf I have:

    <trans-unit id="tx_mytemplate.news">
        <source>NEWSTEST</source>
    </trans-unit>

And then in the tx_news List.html I have:

<f:translate key="tx_mytemplate.news" />

But I do not get any output.

Answer 1

There are two ways of accomplishing the task you are trying to do.

1. add the argument extensionName to the f:translate ViewHelper like so: <f:translate key="tx_mytemplate.news" extensionName="MyTemplate" />
2. add your locallang key as a full path like so <f:translate key="LLL:EXT:my_template/Resources/Private/Language/locallang.xlf:tx_mytemplate.news" />

I would prefer the first way, because it is shorter and you can let extbase/fluid decide where to search for the file.