diff --git a/localedata/locales/aa_ER b/localedata/locales/aa_ER
index 6d20ae9..ca49c22 100644
--- a/localedata/locales/aa_ER
+++ b/localedata/locales/aa_ER
@@ -112,7 +112,7 @@ country_ab2   "ER"
 country_ab3   "ERI"
 country_num   232
 country_car   "ER"
-% country_isbn  unknown, Need ISO 2108
+country_isbn  99948 
 lang_name     "Qafar"
 lang_ab       "aa"
 lang_term     "aar"
diff --git a/localedata/locales/aa_ET b/localedata/locales/aa_ET
index 93fcdb7..31bcf49 100644
--- a/localedata/locales/aa_ET
+++ b/localedata/locales/aa_ET
@@ -112,7 +112,7 @@ country_ab2   "ET"
 country_ab3   "ETH"
 country_num   231   % 210 found in at least one ISO 3166 doc
 country_car   "ETH"
-% country_isbn  unknown, Need ISO 2108
+country_isbn  99944  
 lang_name     "Qafar"
 lang_ab       "aa"
 lang_term     "aar"
diff --git a/localedata/locales/am_ET b/localedata/locales/am_ET
index 7846d62..bf81c22 100644
--- a/localedata/locales/am_ET
+++ b/localedata/locales/am_ET
@@ -947,7 +947,7 @@ country_ab3   "ETH"
 country_num   231   % 210 found in at least one ISO 3166 doc
 % ETH
 country_car   "ETH"
-% country_isbn  unknown, Need ISO 2108
+country_isbn  99944 
 lang_name     "<U12A0><U121B><U122D><U129B>"
 lang_ab      "am"
 lang_term    "amh"
diff --git a/localedata/locales/byn_ER b/localedata/locales/byn_ER
index 608378d..0db4310 100644
--- a/localedata/locales/byn_ER
+++ b/localedata/locales/byn_ER
@@ -123,7 +123,7 @@ country_ab2   "ER"
 country_ab3   "ERI"
 country_num   232
 country_car  "ER"
-% country_isbn  unknown, Need ISO 2108
+country_isbn  99948  
 lang_name     "<U1265><U120A><U1295>"
 lang_ab       ""
 lang_term     "byn"
diff --git a/localedata/locales/gez_ER b/localedata/locales/gez_ER
index 261f9da..ff5eee5 100644
--- a/localedata/locales/gez_ER
+++ b/localedata/locales/gez_ER
@@ -110,7 +110,7 @@ country_ab2   "ER"
 country_ab3   "ERI"
 country_num   232
 country_car   "ER"
-% country_isbn  unknown, Need ISO 2108
+country_isbn  99948 
 lang_name     "<U130D><U12D5><U12DD>"
 lang_term     "gez"
 %
diff --git a/localedata/locales/gez_ET b/localedata/locales/gez_ET
index bc8e0d3..4aecae7 100644
--- a/localedata/locales/gez_ET
+++ b/localedata/locales/gez_ET
@@ -110,7 +110,7 @@ country_ab2   "ET"
 country_ab3   "ETH"
 country_num   231   % 210 found in at least one ISO 3166 doc
 country_car    "ETH"
-% country_isbn  unknown, Need ISO 2108
+country_isbn  99944 
 lang_name     "<U130D><U12D5><U12DD>"
 lang_term     "gez"
 %
diff --git a/localedata/locales/om_ET b/localedata/locales/om_ET
index 881b43f..3d949fe 100644
--- a/localedata/locales/om_ET
+++ b/localedata/locales/om_ET
@@ -145,7 +145,7 @@ country_ab2   "ET"
 country_ab3   "ETH"
 country_num   231   % 210 found in at least one ISO 3166 doc
 country_car    "ETH"
-% country_isbn  unknown, Need ISO 2108
+country_isbn  99944 
 lang_name     "Oromoo"
 lang_ab       "om"
 lang_term     "orm"
diff --git a/localedata/locales/sid_ET b/localedata/locales/sid_ET
index fd56445..ffc223f 100644
--- a/localedata/locales/sid_ET
+++ b/localedata/locales/sid_ET
@@ -113,7 +113,7 @@ country_ab2   "ET"
 country_ab3   "ETH"
 country_num   231   % 210 found in at least one ISO 3166 doc
 country_car   "ETH"
-% country_isbn  unknown, Need ISO 2108
+country_isbn  99944 
 lang_name     "Sidaamu Afo"
 lang_term     "sid"
 lang_lib      "sid"
diff --git a/localedata/locales/so_ET b/localedata/locales/so_ET
index 2f8fe42..5eecbb0 100644
--- a/localedata/locales/so_ET
+++ b/localedata/locales/so_ET
@@ -123,7 +123,7 @@ country_ab2   "ET"
 country_ab3   "ETH"
 country_num   231   % 210 found in at least one ISO 3166 doc
 country_car    "ETH"
-% country_isbn  unknown, Need ISO 2108
+country_isbn  99944 
 lang_name     "Soomaali"
 lang_ab       "so"
 lang_term     "som"
diff --git a/localedata/locales/ti_ER b/localedata/locales/ti_ER
index 890bbb6..15b57d8 100644
--- a/localedata/locales/ti_ER
+++ b/localedata/locales/ti_ER
@@ -143,7 +143,7 @@ country_ab2   "ER"
 country_ab3   "ERI"
 country_num   232
 country_car  "ER"
-% country_isbn  unknown, Need ISO 2108
+country_isbn  99948 
 lang_name     "<U1275><U130D><U122D><U129B>"
 lang_ab       "ti"
 lang_term     "tir"
diff --git a/localedata/locales/ti_ET b/localedata/locales/ti_ET
index e7c8ec3..551f580 100644
--- a/localedata/locales/ti_ET
+++ b/localedata/locales/ti_ET
@@ -946,7 +946,7 @@ country_ab2   "ET"
 country_ab3   "ETH"
 country_num   231   % 210 found in at least one ISO 3166 doc
 country_car    "ETH"
-% country_isbn  unknown, Need ISO 2108
+country_isbn  99944 
 lang_name     "<U1275><U130D><U122D><U129B>"
 lang_ab       "ti"
 lang_term     "tir"
diff --git a/localedata/locales/tig_ER b/localedata/locales/tig_ER
index 403a919..8142dc6 100644
--- a/localedata/locales/tig_ER
+++ b/localedata/locales/tig_ER
@@ -123,7 +123,7 @@ country_ab2   "ER"
 country_ab3   "ERI"
 country_num   232
 country_car  "ER"
-% country_isbn  unknown, Need ISO 2108
+country_isbn  99948 
 lang_name     "<U1275><U130D><U1228>"
 lang_ab       ""
 lang_term     "tig"
diff --git a/localedata/locales/wal_ET b/localedata/locales/wal_ET
index 65b8e5f..05b329e 100644
--- a/localedata/locales/wal_ET
+++ b/localedata/locales/wal_ET
@@ -110,7 +110,7 @@ country_ab2   "ET"
 country_ab3   "ETH"
 country_num   231   % 210 found in at least one ISO 3166 doc
 country_car    "ETH"
-% country_isbn  unknown, Need ISO 2108
+country_isbn  99944
 lang_name     "<U12C8><U120B><U12ED><U1273><U1271>"
 lang_term     "wal"
 lang_lib      "wal"
