I have installed an Extension and FE is shown in the correct language.
Since I modified one template and want to add some text, I tried to add the related ID in the de.localllang.xlf - but it is not shown in FE.
<f:translate id="nextYear" />
<trans-unit id="nextYear"> <source>next year</source> <target state="needs-translation">nächstes Jahr</target> </trans-unit>
Can someone help how I can add own IDs to the language file which then show up in its translation in the FE?