diff --git a/backend/addcorpus/corpus.py b/backend/addcorpus/corpus.py
index e1e6f59bb..b11f279bd 100644
--- a/backend/addcorpus/corpus.py
+++ b/backend/addcorpus/corpus.py
@@ -712,6 +712,7 @@ def __init__(self,
                  visualizations=[],
                  visualization_sort=None,
                  es_mapping={'type': 'text'},
+                 language=None,
                  search_filter=None,
                  extractor=extract.Constant(None),
                  sortable=None,
@@ -735,6 +736,7 @@ def __init__(self,
         self.visualizations = visualizations
         self.visualization_sort = visualization_sort
         self.es_mapping = es_mapping
+        self.language = language
         self.indexed = indexed
         self.hidden = not indexed or hidden
         self.extractor = extractor
diff --git a/backend/corpora/peaceportal/peaceportal.py b/backend/corpora/peaceportal/peaceportal.py
index f4217dc63..1f721d50b 100644
--- a/backend/corpora/peaceportal/peaceportal.py
+++ b/backend/corpora/peaceportal/peaceportal.py
@@ -154,36 +154,42 @@ def request_media(self, document):
     transcription_german = FieldDefinition(
         name='transcription_de',
         es_mapping=main_content_mapping(stopword_analysis=True, stemming_analysis=True, language='de'),
+        language='de',
         hidden=True
     )
 
     transcription_english = FieldDefinition(
         name='transcription_en',
         es_mapping=main_content_mapping(stopword_analysis=True, stemming_analysis=True, language='en'),
+        language='en',
         hidden=True
     )
 
     transcription_hebrew = FieldDefinition(
         name='transcription_he', # no stopwords / stemmers available
         es_mapping={'type': 'text'},
+        language='he',
         hidden=True
     )
 
     transcription_latin = FieldDefinition(
         name='transcription_la',
         es_mapping={'type': 'text'}, # no stopwords / stemmers available
+        language='la',
         hidden=True
     )
 
     transcription_greek = FieldDefinition(
         name='transcription_el',
         es_mapping=main_content_mapping(stopword_analysis=True, stemming_analysis=True, language='el'),
+        language='el',
         hidden=True
     )
 
     transcription_dutch = FieldDefinition(
         name='transcription_nl',
         es_mapping=main_content_mapping(stopword_analysis=True, stemming_analysis=True, language='nl'),
+        language='nl',
         hidden=True
     )