diff --git a/locale/bg_BG.po b/locale/bg_BG.po
index 7b832b8025..a7bbe67845 100644
--- a/locale/bg_BG.po
+++ b/locale/bg_BG.po
@@ -2297,7 +2297,7 @@ msgid "Open"
 msgstr "Отваряне"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Добре"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,force:"
@@ -2305,7 +2305,7 @@ msgid "Force Assign"
 msgstr "Създай изрично назначение"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Добре"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,force:"
@@ -2313,7 +2313,7 @@ msgid "Force Assign"
 msgstr "Създай изрично назначение"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Добре"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,force:"
diff --git a/locale/ca_ES.po b/locale/ca_ES.po
index 53ca3ed338..0c8b6127ab 100644
--- a/locale/ca_ES.po
+++ b/locale/ca_ES.po
@@ -2280,7 +2280,7 @@ msgid "Open"
 msgstr "Obre"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Accepta"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,force:"
@@ -2288,7 +2288,7 @@ msgid "Force Assign"
 msgstr "Força reserva"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Accepta"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,force:"
@@ -2296,7 +2296,7 @@ msgid "Force Assign"
 msgstr "Força reserva"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Accepta"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,force:"
diff --git a/locale/cs_CZ.po b/locale/cs_CZ.po
index 08de1ed46d..e5c4bd0603 100644
--- a/locale/cs_CZ.po
+++ b/locale/cs_CZ.po
@@ -2248,7 +2248,7 @@ msgid "Open"
 msgstr ""
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr ""
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,force:"
@@ -2256,7 +2256,7 @@ msgid "Force Assign"
 msgstr ""
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr ""
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,force:"
@@ -2264,7 +2264,7 @@ msgid "Force Assign"
 msgstr ""
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr ""
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,force:"
diff --git a/locale/de_DE.po b/locale/de_DE.po
index 9edfb0278c..f830fe340c 100644
--- a/locale/de_DE.po
+++ b/locale/de_DE.po
@@ -2290,7 +2290,7 @@ msgid "Open"
 msgstr "Öffnen"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "OK"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,force:"
@@ -2298,7 +2298,7 @@ msgid "Force Assign"
 msgstr "Zuweisung erzwingen"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "OK"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,force:"
@@ -2306,7 +2306,7 @@ msgid "Force Assign"
 msgstr "Zuweisung erzwingen"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "OK"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,force:"
diff --git a/locale/es_AR.po b/locale/es_AR.po
index 7e6ac4b9a5..490654893a 100644
--- a/locale/es_AR.po
+++ b/locale/es_AR.po
@@ -2280,7 +2280,7 @@ msgid "Open"
 msgstr "Abrir"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,force:"
@@ -2288,7 +2288,7 @@ msgid "Force Assign"
 msgstr "Forzar asignación"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,force:"
@@ -2296,7 +2296,7 @@ msgid "Force Assign"
 msgstr "Forzar asignación"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,force:"
diff --git a/locale/es_CO.po b/locale/es_CO.po
index 616c1898b0..0ba19d7322 100644
--- a/locale/es_CO.po
+++ b/locale/es_CO.po
@@ -2280,7 +2280,7 @@ msgid "Open"
 msgstr "Abrir"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,force:"
@@ -2288,7 +2288,7 @@ msgid "Force Assign"
 msgstr "Forzar Asignación"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,force:"
@@ -2296,7 +2296,7 @@ msgid "Force Assign"
 msgstr "Forzar Asignación"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,force:"
diff --git a/locale/es_EC.po b/locale/es_EC.po
index 38dc91fda9..9b3b989df2 100644
--- a/locale/es_EC.po
+++ b/locale/es_EC.po
@@ -2280,7 +2280,7 @@ msgid "Open"
 msgstr "Abrir"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,force:"
@@ -2288,7 +2288,7 @@ msgid "Force Assign"
 msgstr "Forzar Asignación"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,force:"
@@ -2296,7 +2296,7 @@ msgid "Force Assign"
 msgstr "Forzar Asignación"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,force:"
diff --git a/locale/es_ES.po b/locale/es_ES.po
index 274f1745fe..f41754a5ff 100644
--- a/locale/es_ES.po
+++ b/locale/es_ES.po
@@ -2273,7 +2273,7 @@ msgid "Open"
 msgstr "Abrir"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,force:"
@@ -2281,7 +2281,7 @@ msgid "Force Assign"
 msgstr "Forzar reserva"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,force:"
@@ -2289,7 +2289,7 @@ msgid "Force Assign"
 msgstr "Forzar reserva"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Aceptar"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,force:"
diff --git a/locale/fr_FR.po b/locale/fr_FR.po
index 434d5d5671..d5ba297458 100644
--- a/locale/fr_FR.po
+++ b/locale/fr_FR.po
@@ -2281,24 +2281,24 @@ msgid "Open"
 msgstr "Ouvrir"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,end:"
-msgid "Ok"
-msgstr "Ok"
+msgid "OK"
+msgstr "OK"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,force:"
 msgid "Force Assign"
 msgstr "Forcer l'assignation"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,end:"
-msgid "Ok"
-msgstr "Ok"
+msgid "OK"
+msgstr "OK"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,force:"
 msgid "Force Assign"
 msgstr "Forcer l'assignation"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,end:"
-msgid "Ok"
-msgstr "Ok"
+msgid "OK"
+msgstr "OK"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,force:"
 msgid "Force Assign"
diff --git a/locale/nl_NL.po b/locale/nl_NL.po
index f49f041861..88d7a6200b 100644
--- a/locale/nl_NL.po
+++ b/locale/nl_NL.po
@@ -2448,7 +2448,7 @@ msgstr "Open"
 
 #, fuzzy
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Oké"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,force:"
@@ -2457,7 +2457,7 @@ msgstr ""
 
 #, fuzzy
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Oké"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,force:"
@@ -2466,7 +2466,7 @@ msgstr ""
 
 #, fuzzy
 msgctxt "wizard_button:stock.shipment.out.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Oké"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,force:"
diff --git a/locale/ru_RU.po b/locale/ru_RU.po
index 098b37edcd..f7352ee682 100644
--- a/locale/ru_RU.po
+++ b/locale/ru_RU.po
@@ -2274,7 +2274,7 @@ msgid "Open"
 msgstr "Открыть"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Ок"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,force:"
@@ -2282,7 +2282,7 @@ msgid "Force Assign"
 msgstr "Принудительно назначить"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Ок"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,force:"
@@ -2290,7 +2290,7 @@ msgid "Force Assign"
 msgstr "Принудительно назначить"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "Ок"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,force:"
diff --git a/locale/sl_SI.po b/locale/sl_SI.po
index 740477a31b..81314d0905 100644
--- a/locale/sl_SI.po
+++ b/locale/sl_SI.po
@@ -2265,7 +2265,7 @@ msgid "Open"
 msgstr "Odpri"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "V redu"
 
 msgctxt "wizard_button:stock.shipment.in.return.assign,failed,force:"
@@ -2273,7 +2273,7 @@ msgid "Force Assign"
 msgstr "Rezervacija"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "V redu"
 
 msgctxt "wizard_button:stock.shipment.internal.assign,failed,force:"
@@ -2281,7 +2281,7 @@ msgid "Force Assign"
 msgstr "Rezervacija"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,end:"
-msgid "Ok"
+msgid "OK"
 msgstr "V redu"
 
 msgctxt "wizard_button:stock.shipment.out.assign,failed,force:"
diff --git a/shipment.py b/shipment.py
index 7bacd17ecb..9f68959b97 100644
--- a/shipment.py
+++ b/shipment.py
@@ -1718,7 +1718,7 @@ class AssignShipmentOut(Wizard):
                         'group_stock_force_assignment').in_(
                         Eval('context', {}).get('groups', [])),
                     }),
-            Button('Ok', 'end', 'tryton-ok', True),
+            Button('OK', 'end', 'tryton-ok', True),
             ])
     force = StateTransition()
 
@@ -2035,7 +2035,7 @@ class AssignShipmentInternal(Wizard):
                         'group_stock_force_assignment').in_(
                         Eval('context', {}).get('groups', [])),
                     }),
-            Button('Ok', 'end', 'tryton-ok', True),
+            Button('OK', 'end', 'tryton-ok', True),
             ])
     force = StateTransition()
 
@@ -2083,7 +2083,7 @@ class AssignShipmentInReturn(Wizard):
                         'group_stock_force_assignment').in_(
                         Eval('context', {}).get('groups', [])),
                 }),
-            Button('Ok', 'end', 'tryton-ok', True),
+            Button('OK', 'end', 'tryton-ok', True),
             ])
     force = StateTransition()