diff --git a/locale/bg_BG.po b/locale/bg_BG.po
index b28635de67..aa110a6042 100644
--- a/locale/bg_BG.po
+++ b/locale/bg_BG.po
@@ -1178,7 +1178,7 @@ msgid "Cancel"
 msgstr "Отказ"
 
 msgctxt "wizard_button:purchase.handle.invoice.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Добре"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,end:"
@@ -1186,7 +1186,7 @@ msgid "Cancel"
 msgstr "Отказ"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Добре"
 
 #, fuzzy
diff --git a/locale/ca_ES.po b/locale/ca_ES.po
index 5e2a519b5f..81bdadf818 100644
--- a/locale/ca_ES.po
+++ b/locale/ca_ES.po
@@ -1170,7 +1170,7 @@ msgid "Cancel"
 msgstr "Cancel·la"
 
 msgctxt "wizard_button:purchase.handle.invoice.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Accepta"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,end:"
@@ -1178,7 +1178,7 @@ msgid "Cancel"
 msgstr "Cancel·la"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Accepta"
 
 msgctxt "wizard_button:stock.product_quantities_warehouse,start,end:"
diff --git a/locale/cs_CZ.po b/locale/cs_CZ.po
index 3bf6de3c0b..7965e7ef94 100644
--- a/locale/cs_CZ.po
+++ b/locale/cs_CZ.po
@@ -1162,7 +1162,7 @@ msgid "Cancel"
 msgstr ""
 
 msgctxt "wizard_button:purchase.handle.invoice.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr ""
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,end:"
@@ -1170,7 +1170,7 @@ msgid "Cancel"
 msgstr ""
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr ""
 
 msgctxt "wizard_button:stock.product_quantities_warehouse,start,end:"
diff --git a/locale/de_DE.po b/locale/de_DE.po
index 71326c071b..91f1dee564 100644
--- a/locale/de_DE.po
+++ b/locale/de_DE.po
@@ -1178,7 +1178,7 @@ msgid "Cancel"
 msgstr "Abbrechen"
 
 msgctxt "wizard_button:purchase.handle.invoice.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "OK"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,end:"
@@ -1186,7 +1186,7 @@ msgid "Cancel"
 msgstr "Abbrechen"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "OK"
 
 msgctxt "wizard_button:stock.product_quantities_warehouse,start,end:"
diff --git a/locale/es_AR.po b/locale/es_AR.po
index 3a090bdbe2..f89bef34b1 100644
--- a/locale/es_AR.po
+++ b/locale/es_AR.po
@@ -1172,7 +1172,7 @@ msgid "Cancel"
 msgstr "Cancelar"
 
 msgctxt "wizard_button:purchase.handle.invoice.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,end:"
@@ -1180,7 +1180,7 @@ msgid "Cancel"
 msgstr "Cancelar"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.product_quantities_warehouse,start,end:"
diff --git a/locale/es_CO.po b/locale/es_CO.po
index 009255edf0..92da5331cc 100644
--- a/locale/es_CO.po
+++ b/locale/es_CO.po
@@ -1172,7 +1172,7 @@ msgid "Cancel"
 msgstr "Cancelar"
 
 msgctxt "wizard_button:purchase.handle.invoice.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,end:"
@@ -1180,7 +1180,7 @@ msgid "Cancel"
 msgstr "Cancelar"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.product_quantities_warehouse,start,end:"
diff --git a/locale/es_EC.po b/locale/es_EC.po
index 9d6bbb67c9..be188dc364 100644
--- a/locale/es_EC.po
+++ b/locale/es_EC.po
@@ -1172,7 +1172,7 @@ msgid "Cancel"
 msgstr "Cancelar"
 
 msgctxt "wizard_button:purchase.handle.invoice.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,end:"
@@ -1180,7 +1180,7 @@ msgid "Cancel"
 msgstr "Cancelar"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.product_quantities_warehouse,start,end:"
diff --git a/locale/es_ES.po b/locale/es_ES.po
index f9bc6ef1e2..6f55fb6312 100644
--- a/locale/es_ES.po
+++ b/locale/es_ES.po
@@ -1172,7 +1172,7 @@ msgid "Cancel"
 msgstr "Cancelar"
 
 msgctxt "wizard_button:purchase.handle.invoice.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,end:"
@@ -1180,7 +1180,7 @@ msgid "Cancel"
 msgstr "Cancelar"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.product_quantities_warehouse,start,end:"
diff --git a/locale/fr_FR.po b/locale/fr_FR.po
index c755d01d5d..b4d4a21a8e 100644
--- a/locale/fr_FR.po
+++ b/locale/fr_FR.po
@@ -1172,16 +1172,16 @@ msgid "Cancel"
 msgstr "Annuler"
 
 msgctxt "wizard_button:purchase.handle.invoice.exception,ask,handle:"
-msgid "Ok"
-msgstr "Ok"
+msgid "OK"
+msgstr "OK"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,end:"
 msgid "Cancel"
 msgstr "Annuler"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,handle:"
-msgid "Ok"
-msgstr "Ok"
+msgid "OK"
+msgstr "OK"
 
 msgctxt "wizard_button:stock.product_quantities_warehouse,start,end:"
 msgid "Cancel"
diff --git a/locale/nl_NL.po b/locale/nl_NL.po
index 247787b092..05b505f3bd 100644
--- a/locale/nl_NL.po
+++ b/locale/nl_NL.po
@@ -1307,7 +1307,7 @@ msgstr "Annuleren"
 
 #, fuzzy
 msgctxt "wizard_button:purchase.handle.invoice.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Oké"
 
 #, fuzzy
@@ -1317,7 +1317,7 @@ msgstr "Annuleren"
 
 #, fuzzy
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Oké"
 
 #, fuzzy
diff --git a/locale/ru_RU.po b/locale/ru_RU.po
index 95c8b7fcfd..66c01d6b50 100644
--- a/locale/ru_RU.po
+++ b/locale/ru_RU.po
@@ -1177,7 +1177,7 @@ msgid "Cancel"
 msgstr "Отменить"
 
 msgctxt "wizard_button:purchase.handle.invoice.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Ок"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,end:"
@@ -1185,7 +1185,7 @@ msgid "Cancel"
 msgstr "Отменить"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "Ок"
 
 msgctxt "wizard_button:stock.product_quantities_warehouse,start,end:"
diff --git a/locale/sl_SI.po b/locale/sl_SI.po
index f34a1b3d9c..d1958e309f 100644
--- a/locale/sl_SI.po
+++ b/locale/sl_SI.po
@@ -1174,7 +1174,7 @@ msgid "Cancel"
 msgstr "Prekliči"
 
 msgctxt "wizard_button:purchase.handle.invoice.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "V redu"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,end:"
@@ -1182,7 +1182,7 @@ msgid "Cancel"
 msgstr "Prekliči"
 
 msgctxt "wizard_button:purchase.handle.shipment.exception,ask,handle:"
-msgid "Ok"
+msgid "OK"
 msgstr "V redu"
 
 msgctxt "wizard_button:stock.product_quantities_warehouse,start,end:"
diff --git a/purchase.py b/purchase.py
index d2a92df8ca..fd5b919328 100644
--- a/purchase.py
+++ b/purchase.py
@@ -1446,7 +1446,7 @@ class HandleShipmentException(Wizard):
     ask = StateView('purchase.handle.shipment.exception.ask',
         'purchase.handle_shipment_exception_ask_view_form', [
             Button('Cancel', 'end', 'tryton-cancel'),
-            Button('Ok', 'handle', 'tryton-ok', default=True),
+            Button('OK', 'handle', 'tryton-ok', default=True),
             ])
     handle = StateTransition()
 
@@ -1517,7 +1517,7 @@ class HandleInvoiceException(Wizard):
     ask = StateView('purchase.handle.invoice.exception.ask',
         'purchase.handle_invoice_exception_ask_view_form', [
             Button('Cancel', 'end', 'tryton-cancel'),
-            Button('Ok', 'handle', 'tryton-ok', default=True),
+            Button('OK', 'handle', 'tryton-ok', default=True),
             ])
     handle = StateTransition()