CMS Data Resolver - Sprache ermitteln

Okay, habe es selber gefunden. Für alle, die es interessiert:

public function collect(CmsSlotEntity $slot, ResolverContext $resolverContext): ?CriteriaCollection
{
    $criteriaCollection = new CriteriaCollection();

    $criteria = new Criteria([$resolverContext->getSalesChannelContext()->getLanguageId()]);
    $criteriaCollection->add('language_' . $slot->getUniqueIdentifier(), LanguageDefinition::class, $criteria);

    return $criteriaCollection;
}
public function enrich(CmsSlotEntity $slot, ResolverContext $resolverContext, ElementDataCollection $result): void
{
	$languageSearchResult = $result->get('language_' . $slot->getUniqueIdentifier());
	$language = $languageSearchResult->first()->getName());
        
        ...
}

Viele Grüße, Frank