diff --git a/htdocs/comm/action/document.php b/htdocs/comm/action/document.php
index 9ca99f8634b..972858a808f 100644
--- a/htdocs/comm/action/document.php
+++ b/htdocs/comm/action/document.php
@@ -261,7 +261,7 @@ if ($object->id > 0)
 }
 else
 {
-	print $langs->trans("UnkownError");
+	print $langs->trans("ErrorUnknown");
 }
 
 $db->close();
diff --git a/htdocs/comm/propal/document.php b/htdocs/comm/propal/document.php
index 50bc205d9f5..d3766ae27ce 100644
--- a/htdocs/comm/propal/document.php
+++ b/htdocs/comm/propal/document.php
@@ -137,7 +137,7 @@ if ($object->id > 0)
 }
 else
 {
-	print $langs->trans("UnkownError");
+	print $langs->trans("ErrorUnknown");
 }
 
 llxFooter();
diff --git a/htdocs/compta/deplacement/document.php b/htdocs/compta/deplacement/document.php
index 4c44fffa6e5..fb9df1fcb37 100644
--- a/htdocs/compta/deplacement/document.php
+++ b/htdocs/compta/deplacement/document.php
@@ -128,7 +128,7 @@ if ($object->id)
 }
 else
 {
-	print $langs->trans("UnkownError");
+	print $langs->trans("ErrorUnknown");
 }
 
 llxFooter();
diff --git a/htdocs/compta/facture/document.php b/htdocs/compta/facture/document.php
index cc16e5dcf77..1eb5909544b 100644
--- a/htdocs/compta/facture/document.php
+++ b/htdocs/compta/facture/document.php
@@ -160,7 +160,7 @@ if ($id > 0 || ! empty($ref))
 }
 else
 {
-	print $langs->trans("UnkownError");
+	print $langs->trans("ErrorUnknown");
 }
 
 $db->close();
diff --git a/htdocs/compta/sociales/document.php b/htdocs/compta/sociales/document.php
index 2e86a7a6986..88c888de62e 100644
--- a/htdocs/compta/sociales/document.php
+++ b/htdocs/compta/sociales/document.php
@@ -167,7 +167,7 @@ if ($object->id)
 }
 else
 {
-    print $langs->trans("UnkownError");
+    print $langs->trans("ErrorUnknown");
 }
 
 
diff --git a/htdocs/contrat/document.php b/htdocs/contrat/document.php
index c29d3b3186c..ea951f85941 100644
--- a/htdocs/contrat/document.php
+++ b/htdocs/contrat/document.php
@@ -130,7 +130,7 @@ if ($object->id)
 }
 else
 {
-	print $langs->trans("UnkownError");
+	print $langs->trans("ErrorUnknown");
 }
 
 
diff --git a/htdocs/fichinter/document.php b/htdocs/fichinter/document.php
index 76fff7b9834..27e1c4995c1 100644
--- a/htdocs/fichinter/document.php
+++ b/htdocs/fichinter/document.php
@@ -128,7 +128,7 @@ if ($object->id)
 }
 else
 {
-	print $langs->trans("UnkownError");
+	print $langs->trans("ErrorUnknown");
 }
 
 llxFooter();
diff --git a/htdocs/fourn/facture/document.php b/htdocs/fourn/facture/document.php
index 6c47f66ec7d..57cece25772 100644
--- a/htdocs/fourn/facture/document.php
+++ b/htdocs/fourn/facture/document.php
@@ -183,7 +183,7 @@ if ($object->id > 0)
 }
 else
 {
-    print $langs->trans('UnkownError');
+    print $langs->trans('ErrorUnknown');
 }
 
 
diff --git a/htdocs/langs/en_US/main.lang b/htdocs/langs/en_US/main.lang
index d889dedc9d6..c6e8f96bebe 100644
--- a/htdocs/langs/en_US/main.lang
+++ b/htdocs/langs/en_US/main.lang
@@ -34,7 +34,7 @@ ErrorFailedToOpenFile=Failed to open file %s
 ErrorCanNotCreateDir=Can not create dir %s
 ErrorCanNotReadDir=Can not read dir %s
 ErrorConstantNotDefined=Parameter %s not defined
-ErrorUnknown=Unkown error
+ErrorUnknown=Unknown error
 ErrorSQL=SQL Error
 ErrorLogoFileNotFound=Logo file '%s' was not found
 ErrorGoToGlobalSetup=Go to 'Company/Foundation' setup to fix this
diff --git a/htdocs/product/document.php b/htdocs/product/document.php
index 4a5d1691613..3137f31b793 100644
--- a/htdocs/product/document.php
+++ b/htdocs/product/document.php
@@ -147,7 +147,7 @@ if ($object->id)
 }
 else
 {
-	print $langs->trans("UnkownError");
+	print $langs->trans("ErrorUnknown");
 }