diff --git a/src/lang/en_US.h b/src/lang/en_US.h
index 2e742f29..3eb2f47f 100644
--- a/src/lang/en_US.h
+++ b/src/lang/en_US.h
@@ -1,6 +1,8 @@
 #ifndef HASP_LANG_EN_US_H
 #define HASP_LANG_EN_US_H
 
+#define D_ISO_LANG_CODE "en-US"
+
 #define D_USERNAME "Username:"
 #define D_PASSWORD "Password:"
 #define D_SSID "Ssid:"
diff --git a/src/lang/es_ES.h b/src/lang/es_ES.h
index 69c4b650..50f7df08 100644
--- a/src/lang/es_ES.h
+++ b/src/lang/es_ES.h
@@ -1,6 +1,8 @@
 #ifndef HASP_LANG_ES_ES_H
 #define HASP_LANG_ES_ES_H
 
+#define D_ISO_LANG_CODE "es-ES"
+
 #define D_USERNAME "Usuario:"
 #define D_PASSWORD "Contraseña:"
 #define D_SSID "Ssid:"
diff --git a/src/lang/fr_FR.h b/src/lang/fr_FR.h
index b5a64e57..8dcfc2d4 100644
--- a/src/lang/fr_FR.h
+++ b/src/lang/fr_FR.h
@@ -1,6 +1,8 @@
 #ifndef HASP_LANG_FR_FR_H
 #define HASP_LANG_FR_FR_H
 
+#define D_ISO_LANG_CODE "fr-FR"
+
 #define D_USERNAME "Utilisateur:"
 #define D_PASSWORD "Mot de passe:"
 #define D_SSID "Ssid:"
diff --git a/src/lang/hu_HU.h b/src/lang/hu_HU.h
index 592204be..c539b9b8 100644
--- a/src/lang/hu_HU.h
+++ b/src/lang/hu_HU.h
@@ -1,6 +1,8 @@
 #ifndef HASP_LANG_HU_HU_H
 #define HASP_LANG_HU_HU_H
 
+#define D_ISO_LANG_CODE "hu-HU"
+
 #define D_USERNAME "Felhasználónév:"
 #define D_PASSWORD "Jelszó:"
 #define D_SSID "SSID:"
diff --git a/src/lang/nl_NL.h b/src/lang/nl_NL.h
index 150d9071..5d9188bb 100644
--- a/src/lang/nl_NL.h
+++ b/src/lang/nl_NL.h
@@ -1,6 +1,8 @@
 #ifndef HASP_LANG_NL_NL_H
 #define HASP_LANG_NL_NL_H
 
+#define D_ISO_LANG_CODE "nl-NL"
+
 #define D_USERNAME "Gebruikersnaam:"
 #define D_PASSWORD "Wachtwoord:"
 #define D_SSID "Ssid:"
diff --git a/src/lang/pt_BR.h b/src/lang/pt_BR.h
index 61d297ee..f2f83607 100644
--- a/src/lang/pt_BR.h
+++ b/src/lang/pt_BR.h
@@ -4,6 +4,9 @@
 #include "pt_PT.h" // Common language file
 
 // Overrides
+#undef D_ISO_LANG_CODE
+#define D_ISO_LANG_CODE "pt-BR"
+
 #undef D_USERNAME
 #define D_USERNAME "Usuário:"
 
diff --git a/src/lang/pt_PT.h b/src/lang/pt_PT.h
index 93242bb2..10e360c1 100644
--- a/src/lang/pt_PT.h
+++ b/src/lang/pt_PT.h
@@ -1,6 +1,8 @@
 #ifndef HASP_LANG_PT_PT_H
 #define HASP_LANG_PT_PT_H
 
+#define D_ISO_LANG_CODE "pt-PT"
+
 #define D_USERNAME "Utilizador:"
 #define D_PASSWORD "Palavra-passe:"
 #define D_SSID "SSID:"
diff --git a/src/lang/ro_RO.h b/src/lang/ro_RO.h
index 98b0b259..92d00729 100644
--- a/src/lang/ro_RO.h
+++ b/src/lang/ro_RO.h
@@ -1,6 +1,8 @@
 #ifndef HASP_LANG_RO_RO_H
 #define HASP_LANG_RO_RO_H
 
+#define D_ISO_LANG_CODE "ro-RO"
+
 #define D_USERNAME "Nume de utilizator:"
 #define D_PASSWORD "Parola:"
 #define D_SSID "SSID:"