diff --git a/backend/ar/literature.json b/backend/ar/literature.json
index e184ef69..aaf35099 100644
--- a/backend/ar/literature.json
+++ b/backend/ar/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/de/literature.json b/backend/de/literature.json
index 257de348..15dfaab7 100644
--- a/backend/de/literature.json
+++ b/backend/de/literature.json
@@ -54,6 +54,8 @@
         "volume": "Band",
         "volume_explica": "Nummer des Bandes z.B. bei Ver\u00f6ffentlichung in einer Reihe oder bei einem Artikel in einer Fachzeitschrift.",
         "issue": "Ausgabe",
-        "issue_explica": "Nummer der Ausgabe (z.B. bei Artikeln in Fachzeitschriften)."
+        "issue_explica": "Nummer der Ausgabe (z.B. bei Artikeln in Fachzeitschriften).",
+        "issn": "ISSN",
+        "issn_explica": "Internationale Standardnummer f\u00fcr fortlaufende Sammelwerke"
     }
 }
\ No newline at end of file
diff --git a/backend/dsb/literature.json b/backend/dsb/literature.json
index 5afcb169..229bd8c1 100644
--- a/backend/dsb/literature.json
+++ b/backend/dsb/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/en/literature.json b/backend/en/literature.json
index f5e4dfc6..779c5f82 100644
--- a/backend/en/literature.json
+++ b/backend/en/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/es/literature.json b/backend/es/literature.json
index e184ef69..aaf35099 100644
--- a/backend/es/literature.json
+++ b/backend/es/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/fr/literature.json b/backend/fr/literature.json
index 0e8f06bf..32b90872 100644
--- a/backend/fr/literature.json
+++ b/backend/fr/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/hsb/literature.json b/backend/hsb/literature.json
index 5afcb169..229bd8c1 100644
--- a/backend/hsb/literature.json
+++ b/backend/hsb/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/hu/literature.json b/backend/hu/literature.json
index f9c91434..c6753834 100644
--- a/backend/hu/literature.json
+++ b/backend/hu/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/id/literature.json b/backend/id/literature.json
index 12404c32..15a25551 100644
--- a/backend/id/literature.json
+++ b/backend/id/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/it/literature.json b/backend/it/literature.json
index e184ef69..aaf35099 100644
--- a/backend/it/literature.json
+++ b/backend/it/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/iw/literature.json b/backend/iw/literature.json
index e184ef69..aaf35099 100644
--- a/backend/iw/literature.json
+++ b/backend/iw/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/nl/literature.json b/backend/nl/literature.json
index e184ef69..aaf35099 100644
--- a/backend/nl/literature.json
+++ b/backend/nl/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/pl/literature.json b/backend/pl/literature.json
index 3e99b055..91aaae02 100644
--- a/backend/pl/literature.json
+++ b/backend/pl/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/pt/literature.json b/backend/pt/literature.json
index c327bf8e..c45a61f2 100644
--- a/backend/pt/literature.json
+++ b/backend/pt/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/ro/literature.json b/backend/ro/literature.json
index f5e4dfc6..779c5f82 100644
--- a/backend/ro/literature.json
+++ b/backend/ro/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/ru/literature.json b/backend/ru/literature.json
index 12e37f0c..cfb2d3c7 100644
--- a/backend/ru/literature.json
+++ b/backend/ru/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/tl/literature.json b/backend/tl/literature.json
index e184ef69..aaf35099 100644
--- a/backend/tl/literature.json
+++ b/backend/tl/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/tr/literature.json b/backend/tr/literature.json
index afa5e6a9..18811588 100644
--- a/backend/tr/literature.json
+++ b/backend/tr/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/uk/literature.json b/backend/uk/literature.json
index 9cb792e9..593334b9 100644
--- a/backend/uk/literature.json
+++ b/backend/uk/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file
diff --git a/backend/zh/literature.json b/backend/zh/literature.json
index f5e4dfc6..779c5f82 100644
--- a/backend/zh/literature.json
+++ b/backend/zh/literature.json
@@ -54,6 +54,8 @@
         "volume": "Volume",
         "volume_explica": "Volume number e.g. in a series or of a journal.",
         "issue": "Issue",
-        "issue_explica": "Number of the issue (e.g. for journal articles)."
+        "issue_explica": "Number of the issue (e.g. for journal articles).",
+        "issn": "ISSN",
+        "issn_explica": "International Standard Serial Number (ISSN)"
     }
 }
\ No newline at end of file