diff --git a/config/services.yaml b/config/services.yaml
index e10b5bf92d1847b3d19af8feced04632c411e247..88fdfd5bc6a5376afa11f92e3eeade5aa7b61d05 100755
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -25,6 +25,12 @@ parameters:
         SUB_HSD: 'SUB HSD Niedersächsische Staats- und Universitätsbibliothek Göttingen, Abteilung Handschriften und Seltene Drucke'
     tei_dir: '%kernel.project_dir%/data/teis/'
     tei_sample_dir: '%kernel.project_dir%/data/sampletei/'
+    document_languages:
+        eng: Englisch
+        fre: Französisch
+        ger: Deutsch
+        ita: Italienisch
+        lat: Latein
 
 services:
     # default configuration for services in *this* file
@@ -112,3 +118,4 @@ services:
             - method: 'setConfigs'
               arguments:
                   - '%env(MAIN_DOMAIN)%'
+                  - '%document_languages%'
diff --git a/src/Transform/MetadataTransformer.php b/src/Transform/MetadataTransformer.php
index c73c03d705ee1051efd548db9a324c631f30928f..12c28867b78829ac3f39acc95dcd412ed6796182 100644
--- a/src/Transform/MetadataTransformer.php
+++ b/src/Transform/MetadataTransformer.php
@@ -11,15 +11,17 @@ class MetadataTransformer implements MetadataTransformerInterface
 {
     private RouterInterface $router;
     private ?string $mainDomain;
+    private ?array $documentLanguages;
 
     public function __construct(RouterInterface $router)
     {
         $this->router = $router;
     }
 
-    public function setConfigs(string $mainDomain): void
+    public function setConfigs(string $mainDomain, array $documentLanguages): void
     {
         $this->mainDomain = $mainDomain;
+        $this->documentLanguages = $documentLanguages;
     }
 
     public function getAuthor(DOMXPath $xpath): string
@@ -244,6 +246,7 @@ class MetadataTransformer implements MetadataTransformerInterface
         $languageNode = $xpath->query('//tei:text//@xml:lang');
         if ($languageNode->item(0)) {
             $language = $languageNode->item(0)->nodeValue;
+            $language = $this->documentLanguages[$language];
         }
 
         return $language;