diff --git a/src/api/api.cpp b/src/api/api.cpp
index 28f596a2..bace3666 100644
--- a/src/api/api.cpp
+++ b/src/api/api.cpp
@@ -73,13 +73,14 @@ const unsigned int boss_message_error               = boss::g_message_error;
 const unsigned int boss_message_tag                 = boss::g_message_tag;
 
 // BOSS message languages.
-const unsigned int boss_lang_any        = boss::g_lang_any;
-const unsigned int boss_lang_english    = boss::g_lang_english;
-const unsigned int boss_lang_spanish    = boss::g_lang_spanish;
-const unsigned int boss_lang_russian    = boss::g_lang_russian;
-const unsigned int boss_lang_french     = boss::g_lang_french;
-const unsigned int boss_lang_chinese    = boss::g_lang_chinese;
-const unsigned int boss_lang_polish     = boss::g_lang_polish;
+const unsigned int boss_lang_any                    = boss::g_lang_any;
+const unsigned int boss_lang_english                = boss::g_lang_english;
+const unsigned int boss_lang_spanish                = boss::g_lang_spanish;
+const unsigned int boss_lang_russian                = boss::g_lang_russian;
+const unsigned int boss_lang_french                 = boss::g_lang_french;
+const unsigned int boss_lang_chinese                = boss::g_lang_chinese;
+const unsigned int boss_lang_polish                 = boss::g_lang_polish;
+const unsigned int boss_lang_brazilian_portuguese   = boss::g_lang_brazilian_portuguese;
 
 // BOSS cleanliness codes.
 const unsigned int boss_needs_cleaning_no       = 0;
diff --git a/src/api/api.h b/src/api/api.h
index ee66a252..ceef19d9 100644
--- a/src/api/api.h
+++ b/src/api/api.h
@@ -176,6 +176,7 @@ BOSS_API extern const unsigned int boss_lang_russian;  ///< Tells the API to pre
 BOSS_API extern const unsigned int boss_lang_french;  ///< Tells the API to preferentially select French messages.
 BOSS_API extern const unsigned int boss_lang_chinese;  ///< Tells the API to preferentially select Chinese messages.
 BOSS_API extern const unsigned int boss_lang_polish;  ///< Tells the API to preferentially select Polish messages.
+BOSS_API extern const unsigned int boss_lang_brazilian_portuguese;  ///< Tells the API to preferentially select Polish messages.
 ///@}
 
 /*********************************//**
diff --git a/src/archive.py b/src/archive.py
index 23946bba..7788c1c1 100644
--- a/src/archive.py
+++ b/src/archive.py
@@ -65,7 +65,7 @@ if not os.path.exists(temp_path):
 # Now copy everything into the temporary folder.
 shutil.copy( os.path.join('..', 'build', 'BOSS.exe'), temp_path )
 
-for lang in ['es', 'ru', 'fr', 'zh', 'pl']:
+for lang in ['es', 'ru', 'fr', 'zh_CN', 'pl', 'pt_BR']:
     os.makedirs(os.path.join(temp_path, 'resources', 'l10n', lang, 'LC_MESSAGES'))
     shutil.copy( os.path.join('..', 'resources', 'l10n', lang, 'LC_MESSAGES', 'boss.mo'), os.path.join(temp_path, 'resources', 'l10n', lang, 'LC_MESSAGES') )
     shutil.copy( os.path.join('..', 'resources', 'l10n', lang, 'LC_MESSAGES', 'wxstd.mo'), os.path.join(temp_path, 'resources', 'l10n', lang, 'LC_MESSAGES') )
diff --git a/src/backend/globals.cpp b/src/backend/globals.cpp
index 576014f9..7eeaf37e 100644
--- a/src/backend/globals.cpp
+++ b/src/backend/globals.cpp
@@ -39,14 +39,16 @@ namespace boss {
     const unsigned int g_message_error    = 2;
     const unsigned int g_message_tag      = 3;
 
-    //Languages
+    //Languages.
     const unsigned int g_lang_any      = 0;
     const unsigned int g_lang_english  = 1;
     const unsigned int g_lang_spanish  = 2;
     const unsigned int g_lang_russian  = 3;
     const unsigned int g_lang_french   = 4;
     const unsigned int g_lang_chinese  = 5;
-    const unsigned int g_lang_polish   = 6;
+    const unsigned int g_lang_polish = 6;
+    const unsigned int g_lang_brazilian_portuguese = 7;
+
     //Version numbers.
     const unsigned int g_version_major = 3;
     const unsigned int g_version_minor = 0;
diff --git a/src/backend/globals.h b/src/backend/globals.h
index 2df0f087..536bf920 100644
--- a/src/backend/globals.h
+++ b/src/backend/globals.h
@@ -48,6 +48,7 @@ namespace boss {
     extern const unsigned int g_lang_french;
     extern const unsigned int g_lang_chinese;
     extern const unsigned int g_lang_polish;
+    extern const unsigned int g_lang_brazilian_portuguese;
 
     //Version numbers.
     extern const unsigned int g_version_major;
diff --git a/src/backend/helpers.cpp b/src/backend/helpers.cpp
index 2b72dce4..45be616c 100644
--- a/src/backend/helpers.cpp
+++ b/src/backend/helpers.cpp
@@ -239,16 +239,18 @@ namespace boss {
     Language::Language(const std::string& nameOrISOCode) {
         if (nameOrISOCode == Language(g_lang_english).Name() || nameOrISOCode == Language(g_lang_english).Locale())
             Construct(g_lang_english);
-        if (nameOrISOCode == Language(g_lang_english).Name() || nameOrISOCode == Language(g_lang_english).Locale())
+        else if (nameOrISOCode == Language(g_lang_spanish).Name() || nameOrISOCode == Language(g_lang_spanish).Locale())
             Construct(g_lang_spanish);
-        if (nameOrISOCode == Language(g_lang_spanish).Name() || nameOrISOCode == Language(g_lang_spanish).Locale())
+        else if (nameOrISOCode == Language(g_lang_russian).Name() || nameOrISOCode == Language(g_lang_russian).Locale())
             Construct(g_lang_russian);
-        if (nameOrISOCode == Language(g_lang_russian).Name() || nameOrISOCode == Language(g_lang_russian).Locale())
+        else if (nameOrISOCode == Language(g_lang_french).Name() || nameOrISOCode == Language(g_lang_french).Locale())
             Construct(g_lang_french);
-        if (nameOrISOCode == Language(g_lang_french).Name() || nameOrISOCode == Language(g_lang_french).Locale())
+        else if (nameOrISOCode == Language(g_lang_chinese).Name() || nameOrISOCode == Language(g_lang_chinese).Locale())
             Construct(g_lang_chinese);
-        if (nameOrISOCode == Language(g_lang_chinese).Name() || nameOrISOCode == Language(g_lang_chinese).Locale())
+        else if (nameOrISOCode == Language(g_lang_polish).Name() || nameOrISOCode == Language(g_lang_polish).Locale())
             Construct(g_lang_polish);
+        else if (nameOrISOCode == Language(g_lang_brazilian_portuguese).Name() || nameOrISOCode == Language(g_lang_brazilian_portuguese).Locale())
+            Construct(g_lang_brazilian_portuguese);
         else
             Construct(g_lang_any);
     }
@@ -283,6 +285,10 @@ namespace boss {
             _name = "Polski";
             _locale = "pl";
         }
+        else if (_code == g_lang_brazilian_portuguese) {
+            _name = "Português do Brasil";
+            _locale = "pt_BR";
+        }
     }
 
     unsigned int Language::Code() const {
diff --git a/src/backend/helpers.h b/src/backend/helpers.h
index c8cdd453..f3ecfae2 100644
--- a/src/backend/helpers.h
+++ b/src/backend/helpers.h
@@ -84,6 +84,7 @@ namespace boss {
             vec.push_back(Language(g_lang_french).Name());
             vec.push_back(Language(g_lang_chinese).Name());
             vec.push_back(Language(g_lang_polish).Name());
+            vec.push_back(Language(g_lang_brazilian_portuguese).Name());
             return vec;
         }
     private:
diff --git a/src/gui/main.cpp b/src/gui/main.cpp
index 468b25bb..8de77f51 100644
--- a/src/gui/main.cpp
+++ b/src/gui/main.cpp
@@ -252,6 +252,8 @@ bool BossGUI::OnInit() {
             wxLang = wxLANGUAGE_CHINESE;
         else if (lang.Code() == boss::g_lang_polish)
             wxLang = wxLANGUAGE_POLISH;
+        else if (lang.Code() == boss::g_lang_brazilian_portuguese)
+            wxLang = wxLANGUAGE_PORTUGUESE_BRAZILIAN;
     }
 
     //Boost.Locale initialisation: Specify location of language dictionaries.
diff --git a/src/installer.nsi b/src/installer.nsi
index 87e1c366..d258bb7b 100644
--- a/src/installer.nsi
+++ b/src/installer.nsi
@@ -311,15 +311,18 @@ FunctionEnd
 		File "..\resources\l10n\es\LC_MESSAGES\boss.mo"
 		;SetOutPath "$INSTDIR\resources\l10n\de\LC_MESSAGES"
 		;File "..\resources\l10n\de\LC_MESSAGES\wxstd.mo"
-		SetOutPath "$INSTDIR\resources\l10n\zh\LC_MESSAGES"
-		File "..\resources\l10n\zh\LC_MESSAGES\boss.mo"
-		File "..\resources\l10n\zh\LC_MESSAGES\wxstd.mo"
+		SetOutPath "$INSTDIR\resources\l10n\zh_CN\LC_MESSAGES"
+		File "..\resources\l10n\zh_CN\LC_MESSAGES\boss.mo"
+		File "..\resources\l10n\zh_CN\LC_MESSAGES\wxstd.mo"
 		SetOutPath "$INSTDIR\resources\l10n\fr\LC_MESSAGES"
 		File "..\resources\l10n\fr\LC_MESSAGES\wxstd.mo"
 		File "..\resources\l10n\fr\LC_MESSAGES\boss.mo"
 		SetOutPath "$INSTDIR\resources\l10n\pl\LC_MESSAGES"
 		File "..\resources\l10n\pl\LC_MESSAGES\wxstd.mo"
 		File "..\resources\l10n\pl\LC_MESSAGES\boss.mo"
+		SetOutPath "$INSTDIR\resources\l10n\pt_BR\LC_MESSAGES"
+		File "..\resources\l10n\pt_BR\LC_MESSAGES\wxstd.mo"
+		File "..\resources\l10n\pt_BR\LC_MESSAGES\boss.mo"
 		
         ;Install settings file.
         SetOutPath "$LOCALAPPDATA\BOSS"
@@ -329,33 +332,38 @@ FunctionEnd
 		StrCmp $LANGUAGE ${LANG_RUSSIAN} 0 +5
             Push "$LOCALAPPDATA\BOSS\settings.yaml"
             Push "Language:"
-            Push "Language: rus"
+            Push "Language: ru"
             Call ReplaceLineStr
 		;StrCmp $LANGUAGE ${LANG_GERMAN} 0 +5
         ;    Push "$LOCALAPPDATA\BOSS\settings.yaml"
         ;    Push "Language:"
-        ;    Push "Language: deu"
+        ;    Push "Language: de"
         ;    Call ReplaceLineStr
 		StrCmp $LANGUAGE ${LANG_SPANISH} 0 +5
             Push "$LOCALAPPDATA\BOSS\settings.yaml"
             Push "Language:"
-            Push "Language: spa"
+            Push "Language: es"
             Call ReplaceLineStr
 		StrCmp $LANGUAGE ${LANG_SIMPCHINESE} 0 +5
             Push "$LOCALAPPDATA\BOSS\settings.yaml"
             Push "Language:"
-            Push "Language: zho"
+            Push "Language: zh_CN"
             Call ReplaceLineStr
 		StrCmp $LANGUAGE ${LANG_FRENCH} 0 +5
             Push "$LOCALAPPDATA\BOSS\settings.yaml"
             Push "Language:"
-            Push "Language: fra"
+            Push "Language: fr"
             Call ReplaceLineStr
 		StrCmp $LANGUAGE ${LANG_POLISH} 0 +5
             Push "$LOCALAPPDATA\BOSS\settings.yaml"
             Push "Language:"
-            Push "Language: pol"
+            Push "Language: pl"
             Call ReplaceLineStr
+		;StrCmp $LANGUAGE ${LANG_PORTUGUESEBR} 0 +5
+        ;    Push "$LOCALAPPDATA\BOSS\settings.yaml"
+        ;    Push "Language:"
+        ;    Push "Language: pt_BR"
+        ;    Call ReplaceLineStr
 			
 		;Add Start Menu shortcuts. Set out path back to $INSTDIR otherwise the shortcuts start in the wrong place.
 		;Set Shell Var Context to all so that shortcuts are installed for all users, not just admin.
@@ -469,24 +477,28 @@ FunctionEnd
 		Delete "$INSTDIR\resources\l10n\es\LC_MESSAGES\boss.mo"
 		Delete "$INSTDIR\resources\l10n\es\LC_MESSAGES\wxstd.mo"
 		;Delete "$INSTDIR\resources\l10n\de\LC_MESSAGES\wxstd.mo"
-		Delete "$INSTDIR\resources\l10n\zh\LC_MESSAGES\boss.mo"
-		Delete "$INSTDIR\resources\l10n\zh\LC_MESSAGES\wxstd.mo"
+		Delete "$INSTDIR\resources\l10n\zh_CN\LC_MESSAGES\boss.mo"
+		Delete "$INSTDIR\resources\l10n\zh_CN\LC_MESSAGES\wxstd.mo"
 		Delete "$INSTDIR\resources\l10n\fr\LC_MESSAGES\boss.mo"
 		Delete "$INSTDIR\resources\l10n\fr\LC_MESSAGES\wxstd.mo"
 		Delete "$INSTDIR\resources\l10n\pl\LC_MESSAGES\boss.mo"
-		Delete "$INSTDIR\resources\l10n\pl\LC_MESSAGES\wxstd.mo"		
+		Delete "$INSTDIR\resources\l10n\pl\LC_MESSAGES\wxstd.mo"
+		Delete "$INSTDIR\resources\l10n\pt_BR\LC_MESSAGES\boss.mo"
+		Delete "$INSTDIR\resources\l10n\pt_BR\LC_MESSAGES\wxstd.mo"
 		RMDir  "$INSTDIR\resources\l10n\ru\LC_MESSAGES"
 		RMDir  "$INSTDIR\resources\l10n\ru"
 		RMDir  "$INSTDIR\resources\l10n\es\LC_MESSAGES"
 		RMDir  "$INSTDIR\resources\l10n\es"
 		;RMDir  "$INSTDIR\resources\l10n\de\LC_MESSAGES"
 		;RMDir  "$INSTDIR\resources\l10n\de"
-		RMDir  "$INSTDIR\resources\l10n\zh\LC_MESSAGES"
-		RMDir  "$INSTDIR\resources\l10n\zh"
+		RMDir  "$INSTDIR\resources\l10n\zh_CN\LC_MESSAGES"
+		RMDir  "$INSTDIR\resources\l10n\zh_CN"
 		RMDir  "$INSTDIR\resources\l10n\fr\LC_MESSAGES"
 		RMDir  "$INSTDIR\resources\l10n\fr"
 		RMDir  "$INSTDIR\resources\l10n\pl\LC_MESSAGES"
-		RMDir  "$INSTDIR\resources\l10n\pl"		
+		RMDir  "$INSTDIR\resources\l10n\pl"
+		RMDir  "$INSTDIR\resources\l10n\pt_BR\LC_MESSAGES"
+		RMDir  "$INSTDIR\resources\l10n\pt_BR"	
 		RMDir  "$INSTDIR\resources\l10n"
         RMDir  "$INSTDIR\resources"