diff --git a/src/Model/Item.php b/src/Model/Item.php
index 491050c582..c3f38ca6da 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -1996,19 +1996,31 @@ class Item
 	 * @return string detected language
 	 * @throws \Text_LanguageDetect_Exception
 	 */
-	private static function getLanguage(array $item): string
+	private static function getLanguage(array $item): ?string
 	{
 		if (!empty($item['language'])) {
 			return $item['language'];
 		}
 
-		if (!in_array($item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) || empty($item['body'])) {
-			return '';
+		$transmitted = [];
+		foreach ($item['transmitted-languages'] ??  [] as $language) {
+			$transmitted[$language] = 0;
 		}
 
-		$languages = self::getLanguageArray($item['title'] . ' ' . ($item['content-warning'] ?? '') . ' ' . $item['body'], 3, $item['uri-id'], $item['author-id']);
+		$content = trim(($item['title'] ?? '') . ' ' . ($item['content-warning'] ?? '') . ' ' . ($item['body'] ?? ''));
+
+		if (!in_array($item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) || empty($content)) {
+			return !empty($transmitted) ? json_encode($transmitted) : null;
+		}
+
+		$languages = self::getLanguageArray($content, 3, $item['uri-id'], $item['author-id']);
 		if (empty($languages)) {
-			return '';
+			return !empty($transmitted) ? json_encode($transmitted) : null;
+		}
+
+		if (!empty($transmitted)) {
+			$languages = array_merge($transmitted, $languages);
+			arsort($languages);
 		}
 
 		return json_encode($languages);
@@ -2209,7 +2221,7 @@ class Item
 
 		// Glue it together to be able to make a hash from it
 		if (!empty($parsed)) {
-			$host_id = implode('/', $parsed);
+			$host_id = implode('/', (array)$parsed);
 		} else {
 			$host_id = $uri;
 		}
@@ -3435,7 +3447,7 @@ class Item
 		unset($urlparts['fragment']);
 
 		try {
-			$url = (string)Uri::fromParts($urlparts);
+			$url = (string)Uri::fromParts((array)$urlparts);
 		} catch (\InvalidArgumentException $e) {
 			DI::logger()->notice('Invalid URL', ['$url' => $url, '$urlparts' => $urlparts]);
 			/* See https://github.com/friendica/friendica/issues/12113
diff --git a/src/Protocol/ActivityPub/Processor.php b/src/Protocol/ActivityPub/Processor.php
index 83c068e0ed..49116444ad 100644
--- a/src/Protocol/ActivityPub/Processor.php
+++ b/src/Protocol/ActivityPub/Processor.php
@@ -854,6 +854,8 @@ class Processor
 			$item['language'] = self::processLanguages($activity['languages']);
 		}
 
+		$item['transmitted-languages'] = $activity['transmitted-languages'];
+
 		if (!empty($activity['emojis'])) {
 			$content = self::replaceEmojis($item['uri-id'], $content, $activity['emojis']);
 		}
@@ -1727,7 +1729,7 @@ class Processor
 			}
 		}
 
-		$languages = self::getPostLanguages($activity);
+		$languages = self::getPostLanguages($activity['as:object'] ?? '');
 
 		return Relay::isSolicitedPost($messageTags, $content, $authorid, $id, Protocol::ACTIVITYPUB, $activity['thread-completion'] ?? 0, $languages);
 	}
@@ -1738,10 +1740,10 @@ class Processor
 	 * @param array $activity
 	 * @return array
 	 */
-	private static function getPostLanguages(array $activity): array
+	public static function getPostLanguages(array $activity): array
 	{
-		$content   = JsonLD::fetchElement($activity['as:object'], 'as:content') ?? '';
-		$languages = JsonLD::fetchElementArray($activity['as:object'], 'as:content', '@language') ?? [];
+		$content   = JsonLD::fetchElement($activity, 'as:content') ?? '';
+		$languages = JsonLD::fetchElementArray($activity, 'as:content', '@language') ?? [];
 		if (empty($languages)) {
 			return [];
 		}
diff --git a/src/Protocol/ActivityPub/Receiver.php b/src/Protocol/ActivityPub/Receiver.php
index bb671003da..cd48768cc7 100644
--- a/src/Protocol/ActivityPub/Receiver.php
+++ b/src/Protocol/ActivityPub/Receiver.php
@@ -2005,6 +2005,7 @@ class Receiver
 		$object_data['tags'] = self::processTags(JsonLD::fetchElementArray($object, 'as:tag') ?? []);
 		$object_data['emojis'] = self::processEmojis(JsonLD::fetchElementArray($object, 'as:tag', null, '@type', 'toot:Emoji') ?? []);
 		$object_data['languages'] = self::processLanguages(JsonLD::fetchElementArray($object, 'sc:inLanguage') ?? []);
+		$object_data['transmitted-languages'] = Processor::getPostLanguages($object);
 		$object_data['generator'] = JsonLD::fetchElement($object, 'as:generator', 'as:name', '@type', 'as:Application');
 		$object_data['generator'] = JsonLD::fetchElement($object_data, 'generator', '@value');
 		$object_data['alternate-url'] = JsonLD::fetchElement($object, 'as:url', '@id');