Standard language codes (#5218)

* Use standard language codes. Fallback for plugins.

* Fix transifex config

* Tab vs space here for some reason

* Remove redundancies

* config.relative_path instead of allcaps

* added upgrade script for existing users' accounts

.tx/config

@@ -3,7 +3,7 @@ host = https://www.transifex.com
 
 [nodebb.category]
 file_filter = public/language/<lang>/category.json
-source_file = public/language/en_GB/category.json
+source_file = public/language/en-GB/category.json
 source_lang = en_GB
 trans.ar = public/language/ar/category.json
 trans.bn = public/language/bn/category.json
@@ -12,11 +12,11 @@ trans.cs = public/language/cs/category.json
 trans.da = public/language/da/category.json
 trans.de = public/language/de/category.json
 trans.el = public/language/el/category.json
-trans.en_US = public/language/en_US/category.json
-trans.en@pirate = public/language/en@pirate/category.json
+trans.en_US = public/language/en-US/category.json
+trans.en@pirate = public/language/en-x-pirate/category.json
 trans.es = public/language/es/category.json
 trans.et = public/language/et/category.json
-trans.fa_IR = public/language/fa_IR/category.json
+trans.fa_IR = public/language/fa-IR/category.json
 trans.fi = public/language/fi/category.json
 trans.fr = public/language/fr/category.json
 trans.gl = public/language/gl/category.json
@@ -31,7 +31,7 @@ trans.ms = public/language/ms/category.json
 trans.nb = public/language/nb/category.json
 trans.nl = public/language/nl/category.json
 trans.pl = public/language/pl/category.json
-trans.pt_BR = public/language/pt_BR/category.json
+trans.pt_BR = public/language/pt-BR/category.json
 trans.ru = public/language/ru/category.json
 trans.ro = public/language/ro/category.json
 trans.rw = public/language/rw/category.json
@@ -43,13 +43,13 @@ trans.sv = public/language/sv/category.json
 trans.th = public/language/th/category.json
 trans.tr = public/language/tr/category.json
 trans.vi = public/language/vi/category.json
-trans.zh_CN = public/language/zh_CN/category.json
-trans.zh_TW = public/language/zh_TW/category.json
+trans.zh_CN = public/language/zh-CN/category.json
+trans.zh_TW = public/language/zh-TW/category.json
 type = KEYVALUEJSON
 
 [nodebb.login]
 file_filter = public/language/<lang>/login.json
-source_file = public/language/en_GB/login.json
+source_file = public/language/en-GB/login.json
 source_lang = en_GB
 trans.ar = public/language/ar/login.json
 trans.bn = public/language/bn/login.json
@@ -58,11 +58,11 @@ trans.cs = public/language/cs/login.json
 trans.da = public/language/da/login.json
 trans.de = public/language/de/login.json
 trans.el = public/language/el/login.json
-trans.en_US = public/language/en_US/login.json
-trans.en@pirate = public/language/en@pirate/login.json
+trans.en_US = public/language/en-US/login.json
+trans.en@pirate = public/language/en-x-pirate/login.json
 trans.es = public/language/es/login.json
 trans.et = public/language/et/login.json
-trans.fa_IR = public/language/fa_IR/login.json
+trans.fa_IR = public/language/fa-IR/login.json
 trans.fi = public/language/fi/login.json
 trans.fr = public/language/fr/login.json
 trans.gl = public/language/gl/login.json
@@ -77,7 +77,7 @@ trans.ms = public/language/ms/login.json
 trans.nb = public/language/nb/login.json
 trans.nl = public/language/nl/login.json
 trans.pl = public/language/pl/login.json
-trans.pt_BR = public/language/pt_BR/login.json
+trans.pt_BR = public/language/pt-BR/login.json
 trans.ru = public/language/ru/login.json
 trans.ro = public/language/ro/login.json
 trans.rw = public/language/rw/login.json
@@ -89,13 +89,13 @@ trans.sv = public/language/sv/login.json
 trans.th = public/language/th/login.json
 trans.tr = public/language/tr/login.json
 trans.vi = public/language/vi/login.json
-trans.zh_CN = public/language/zh_CN/login.json
-trans.zh_TW = public/language/zh_TW/login.json
+trans.zh_CN = public/language/zh-CN/login.json
+trans.zh_TW = public/language/zh-TW/login.json
 type = KEYVALUEJSON
 
 [nodebb.recent]
 file_filter = public/language/<lang>/recent.json
-source_file = public/language/en_GB/recent.json
+source_file = public/language/en-GB/recent.json
 source_lang = en_GB
 trans.ar = public/language/ar/recent.json
 trans.bn = public/language/bn/recent.json
@@ -104,11 +104,11 @@ trans.cs = public/language/cs/recent.json
 trans.da = public/language/da/recent.json
 trans.de = public/language/de/recent.json
 trans.el = public/language/el/recent.json
-trans.en_US = public/language/en_US/recent.json
-trans.en@pirate = public/language/en@pirate/recent.json
+trans.en_US = public/language/en-US/recent.json
+trans.en@pirate = public/language/en-x-pirate/recent.json
 trans.es = public/language/es/recent.json
 trans.et = public/language/et/recent.json
-trans.fa_IR = public/language/fa_IR/recent.json
+trans.fa_IR = public/language/fa-IR/recent.json
 trans.fi = public/language/fi/recent.json
 trans.fr = public/language/fr/recent.json
 trans.gl = public/language/gl/recent.json
@@ -123,7 +123,7 @@ trans.ms = public/language/ms/recent.json
 trans.nb = public/language/nb/recent.json
 trans.nl = public/language/nl/recent.json
 trans.pl = public/language/pl/recent.json
-trans.pt_BR = public/language/pt_BR/recent.json
+trans.pt_BR = public/language/pt-BR/recent.json
 trans.ru = public/language/ru/recent.json
 trans.ro = public/language/ro/recent.json
 trans.rw = public/language/rw/recent.json
@@ -135,13 +135,13 @@ trans.sv = public/language/sv/recent.json
 trans.th = public/language/th/recent.json
 trans.tr = public/language/tr/recent.json
 trans.vi = public/language/vi/recent.json
-trans.zh_CN = public/language/zh_CN/recent.json
-trans.zh_TW = public/language/zh_TW/recent.json
+trans.zh_CN = public/language/zh-CN/recent.json
+trans.zh_TW = public/language/zh-TW/recent.json
 type = KEYVALUEJSON
 
 [nodebb.unread]
 file_filter = public/language/<lang>/unread.json
-source_file = public/language/en_GB/unread.json
+source_file = public/language/en-GB/unread.json
 source_lang = en_GB
 trans.ar = public/language/ar/unread.json
 trans.bn = public/language/bn/unread.json
@@ -150,11 +150,11 @@ trans.cs = public/language/cs/unread.json
 trans.da = public/language/da/unread.json
 trans.de = public/language/de/unread.json
 trans.el = public/language/el/unread.json
-trans.en_US = public/language/en_US/unread.json
-trans.en@pirate = public/language/en@pirate/unread.json
+trans.en_US = public/language/en-US/unread.json
+trans.en@pirate = public/language/en-x-pirate/unread.json
 trans.es = public/language/es/unread.json
 trans.et = public/language/et/unread.json
-trans.fa_IR = public/language/fa_IR/unread.json
+trans.fa_IR = public/language/fa-IR/unread.json
 trans.fi = public/language/fi/unread.json
 trans.fr = public/language/fr/unread.json
 trans.gl = public/language/gl/unread.json
@@ -169,7 +169,7 @@ trans.ms = public/language/ms/unread.json
 trans.nb = public/language/nb/unread.json
 trans.nl = public/language/nl/unread.json
 trans.pl = public/language/pl/unread.json
-trans.pt_BR = public/language/pt_BR/unread.json
+trans.pt_BR = public/language/pt-BR/unread.json
 trans.ru = public/language/ru/unread.json
 trans.ro = public/language/ro/unread.json
 trans.rw = public/language/rw/unread.json
@@ -181,13 +181,13 @@ trans.sv = public/language/sv/unread.json
 trans.th = public/language/th/unread.json
 trans.tr = public/language/tr/unread.json
 trans.vi = public/language/vi/unread.json
-trans.zh_CN = public/language/zh_CN/unread.json
-trans.zh_TW = public/language/zh_TW/unread.json
+trans.zh_CN = public/language/zh-CN/unread.json
+trans.zh_TW = public/language/zh-TW/unread.json
 type = KEYVALUEJSON
 
 [nodebb.modules]
 file_filter = public/language/<lang>/modules.json
-source_file = public/language/en_GB/modules.json
+source_file = public/language/en-GB/modules.json
 source_lang = en_GB
 trans.ar = public/language/ar/modules.json
 trans.bn = public/language/bn/modules.json
@@ -196,11 +196,11 @@ trans.cs = public/language/cs/modules.json
 trans.da = public/language/da/modules.json
 trans.de = public/language/de/modules.json
 trans.el = public/language/el/modules.json
-trans.en_US = public/language/en_US/modules.json
-trans.en@pirate = public/language/en@pirate/modules.json
+trans.en_US = public/language/en-US/modules.json
+trans.en@pirate = public/language/en-x-pirate/modules.json
 trans.es = public/language/es/modules.json
 trans.et = public/language/et/modules.json
-trans.fa_IR = public/language/fa_IR/modules.json
+trans.fa_IR = public/language/fa-IR/modules.json
 trans.fi = public/language/fi/modules.json
 trans.fr = public/language/fr/modules.json
 trans.gl = public/language/gl/modules.json
@@ -215,7 +215,7 @@ trans.ms = public/language/ms/modules.json
 trans.nb = public/language/nb/modules.json
 trans.nl = public/language/nl/modules.json
 trans.pl = public/language/pl/modules.json
-trans.pt_BR = public/language/pt_BR/modules.json
+trans.pt_BR = public/language/pt-BR/modules.json
 trans.ru = public/language/ru/modules.json
 trans.ro = public/language/ro/modules.json
 trans.rw = public/language/rw/modules.json
@@ -227,13 +227,13 @@ trans.sv = public/language/sv/modules.json
 trans.th = public/language/th/modules.json
 trans.tr = public/language/tr/modules.json
 trans.vi = public/language/vi/modules.json
-trans.zh_CN = public/language/zh_CN/modules.json
-trans.zh_TW = public/language/zh_TW/modules.json
+trans.zh_CN = public/language/zh-CN/modules.json
+trans.zh_TW = public/language/zh-TW/modules.json
 type = KEYVALUEJSON
 
 [nodebb.register]
 file_filter = public/language/<lang>/register.json
-source_file = public/language/en_GB/register.json
+source_file = public/language/en-GB/register.json
 source_lang = en_GB
 trans.ar = public/language/ar/register.json
 trans.bn = public/language/bn/register.json
@@ -242,11 +242,11 @@ trans.cs = public/language/cs/register.json
 trans.da = public/language/da/register.json
 trans.de = public/language/de/register.json
 trans.el = public/language/el/register.json
-trans.en_US = public/language/en_US/register.json
-trans.en@pirate = public/language/en@pirate/register.json
+trans.en_US = public/language/en-US/register.json
+trans.en@pirate = public/language/en-x-pirate/register.json
 trans.es = public/language/es/register.json
 trans.et = public/language/et/register.json
-trans.fa_IR = public/language/fa_IR/register.json
+trans.fa_IR = public/language/fa-IR/register.json
 trans.fi = public/language/fi/register.json
 trans.fr = public/language/fr/register.json
 trans.gl = public/language/gl/register.json
@@ -261,7 +261,7 @@ trans.ms = public/language/ms/register.json
 trans.nb = public/language/nb/register.json
 trans.nl = public/language/nl/register.json
 trans.pl = public/language/pl/register.json
-trans.pt_BR = public/language/pt_BR/register.json
+trans.pt_BR = public/language/pt-BR/register.json
 trans.ru = public/language/ru/register.json
 trans.ro = public/language/ro/register.json
 trans.rw = public/language/rw/register.json
@@ -273,13 +273,13 @@ trans.sv = public/language/sv/register.json
 trans.th = public/language/th/register.json
 trans.tr = public/language/tr/register.json
 trans.vi = public/language/vi/register.json
-trans.zh_CN = public/language/zh_CN/register.json
-trans.zh_TW = public/language/zh_TW/register.json
+trans.zh_CN = public/language/zh-CN/register.json
+trans.zh_TW = public/language/zh-TW/register.json
 type = KEYVALUEJSON
 
 [nodebb.user]
 file_filter = public/language/<lang>/user.json
-source_file = public/language/en_GB/user.json
+source_file = public/language/en-GB/user.json
 source_lang = en_GB
 trans.ar = public/language/ar/user.json
 trans.bn = public/language/bn/user.json
@@ -288,11 +288,11 @@ trans.cs = public/language/cs/user.json
 trans.da = public/language/da/user.json
 trans.de = public/language/de/user.json
 trans.el = public/language/el/user.json
-trans.en_US = public/language/en_US/user.json
-trans.en@pirate = public/language/en@pirate/user.json
+trans.en_US = public/language/en-US/user.json
+trans.en@pirate = public/language/en-x-pirate/user.json
 trans.es = public/language/es/user.json
 trans.et = public/language/et/user.json
-trans.fa_IR = public/language/fa_IR/user.json
+trans.fa_IR = public/language/fa-IR/user.json
 trans.fi = public/language/fi/user.json
 trans.fr = public/language/fr/user.json
 trans.gl = public/language/gl/user.json
@@ -307,7 +307,7 @@ trans.ms = public/language/ms/user.json
 trans.nb = public/language/nb/user.json
 trans.nl = public/language/nl/user.json
 trans.pl = public/language/pl/user.json
-trans.pt_BR = public/language/pt_BR/user.json
+trans.pt_BR = public/language/pt-BR/user.json
 trans.ru = public/language/ru/user.json
 trans.ro = public/language/ro/user.json
 trans.rw = public/language/rw/user.json
@@ -319,13 +319,13 @@ trans.sv = public/language/sv/user.json
 trans.th = public/language/th/user.json
 trans.tr = public/language/tr/user.json
 trans.vi = public/language/vi/user.json
-trans.zh_CN = public/language/zh_CN/user.json
-trans.zh_TW = public/language/zh_TW/user.json
+trans.zh_CN = public/language/zh-CN/user.json
+trans.zh_TW = public/language/zh-TW/user.json
 type = KEYVALUEJSON
 
 [nodebb.global]
 file_filter = public/language/<lang>/global.json
-source_file = public/language/en_GB/global.json
+source_file = public/language/en-GB/global.json
 source_lang = en_GB
 trans.ar = public/language/ar/global.json
 trans.bn = public/language/bn/global.json
@@ -334,11 +334,11 @@ trans.cs = public/language/cs/global.json
 trans.da = public/language/da/global.json
 trans.de = public/language/de/global.json
 trans.el = public/language/el/global.json
-trans.en_US = public/language/en_US/global.json
-trans.en@pirate = public/language/en@pirate/global.json
+trans.en_US = public/language/en-US/global.json
+trans.en@pirate = public/language/en-x-pirate/global.json
 trans.es = public/language/es/global.json
 trans.et = public/language/et/global.json
-trans.fa_IR = public/language/fa_IR/global.json
+trans.fa_IR = public/language/fa-IR/global.json
 trans.fi = public/language/fi/global.json
 trans.fr = public/language/fr/global.json
 trans.gl = public/language/gl/global.json
@@ -353,7 +353,7 @@ trans.ms = public/language/ms/global.json
 trans.nb = public/language/nb/global.json
 trans.nl = public/language/nl/global.json
 trans.pl = public/language/pl/global.json
-trans.pt_BR = public/language/pt_BR/global.json
+trans.pt_BR = public/language/pt-BR/global.json
 trans.ru = public/language/ru/global.json
 trans.ro = public/language/ro/global.json
 trans.rw = public/language/rw/global.json
@@ -365,13 +365,13 @@ trans.sv = public/language/sv/global.json
 trans.th = public/language/th/global.json
 trans.tr = public/language/tr/global.json
 trans.vi = public/language/vi/global.json
-trans.zh_CN = public/language/zh_CN/global.json
-trans.zh_TW = public/language/zh_TW/global.json
+trans.zh_CN = public/language/zh-CN/global.json
+trans.zh_TW = public/language/zh-TW/global.json
 type = KEYVALUEJSON
 
 [nodebb.notifications]
 file_filter = public/language/<lang>/notifications.json
-source_file = public/language/en_GB/notifications.json
+source_file = public/language/en-GB/notifications.json
 source_lang = en_GB
 trans.ar = public/language/ar/notifications.json
 trans.bn = public/language/bn/notifications.json
@@ -380,11 +380,11 @@ trans.cs = public/language/cs/notifications.json
 trans.da = public/language/da/notifications.json
 trans.de = public/language/de/notifications.json
 trans.el = public/language/el/notifications.json
-trans.en_US = public/language/en_US/notifications.json
-trans.en@pirate = public/language/en@pirate/notifications.json
+trans.en_US = public/language/en-US/notifications.json
+trans.en@pirate = public/language/en-x-pirate/notifications.json
 trans.es = public/language/es/notifications.json
 trans.et = public/language/et/notifications.json
-trans.fa_IR = public/language/fa_IR/notifications.json
+trans.fa_IR = public/language/fa-IR/notifications.json
 trans.fi = public/language/fi/notifications.json
 trans.fr = public/language/fr/notifications.json
 trans.gl = public/language/gl/notifications.json
@@ -399,7 +399,7 @@ trans.ms = public/language/ms/notifications.json
 trans.nb = public/language/nb/notifications.json
 trans.nl = public/language/nl/notifications.json
 trans.pl = public/language/pl/notifications.json
-trans.pt_BR = public/language/pt_BR/notifications.json
+trans.pt_BR = public/language/pt-BR/notifications.json
 trans.ru = public/language/ru/notifications.json
 trans.ro = public/language/ro/notifications.json
 trans.rw = public/language/rw/notifications.json
@@ -411,13 +411,13 @@ trans.sv = public/language/sv/notifications.json
 trans.th = public/language/th/notifications.json
 trans.tr = public/language/tr/notifications.json
 trans.vi = public/language/vi/notifications.json
-trans.zh_CN = public/language/zh_CN/notifications.json
-trans.zh_TW = public/language/zh_TW/notifications.json
+trans.zh_CN = public/language/zh-CN/notifications.json
+trans.zh_TW = public/language/zh-TW/notifications.json
 type = KEYVALUEJSON
 
 [nodebb.reset_password]
 file_filter = public/language/<lang>/reset_password.json
-source_file = public/language/en_GB/reset_password.json
+source_file = public/language/en-GB/reset_password.json
 source_lang = en_GB
 trans.ar = public/language/ar/reset_password.json
 trans.bn = public/language/bn/reset_password.json
@@ -426,11 +426,11 @@ trans.cs = public/language/cs/reset_password.json
 trans.da = public/language/da/reset_password.json
 trans.de = public/language/de/reset_password.json
 trans.el = public/language/el/reset_password.json
-trans.en_US = public/language/en_US/reset_password.json
-trans.en@pirate = public/language/en@pirate/reset_password.json
+trans.en_US = public/language/en-US/reset_password.json
+trans.en@pirate = public/language/en-x-pirate/reset_password.json
 trans.es = public/language/es/reset_password.json
 trans.et = public/language/et/reset_password.json
-trans.fa_IR = public/language/fa_IR/reset_password.json
+trans.fa_IR = public/language/fa-IR/reset_password.json
 trans.fi = public/language/fi/reset_password.json
 trans.fr = public/language/fr/reset_password.json
 trans.gl = public/language/gl/reset_password.json
@@ -445,7 +445,7 @@ trans.ms = public/language/ms/reset_password.json
 trans.nb = public/language/nb/reset_password.json
 trans.nl = public/language/nl/reset_password.json
 trans.pl = public/language/pl/reset_password.json
-trans.pt_BR = public/language/pt_BR/reset_password.json
+trans.pt_BR = public/language/pt-BR/reset_password.json
 trans.ru = public/language/ru/reset_password.json
 trans.ro = public/language/ro/reset_password.json
 trans.rw = public/language/rw/reset_password.json
@@ -457,13 +457,13 @@ trans.sv = public/language/sv/reset_password.json
 trans.th = public/language/th/reset_password.json
 trans.tr = public/language/tr/reset_password.json
 trans.vi = public/language/vi/reset_password.json
-trans.zh_CN = public/language/zh_CN/reset_password.json
-trans.zh_TW = public/language/zh_TW/reset_password.json
+trans.zh_CN = public/language/zh-CN/reset_password.json
+trans.zh_TW = public/language/zh-TW/reset_password.json
 type = KEYVALUEJSON
 
 [nodebb.users]
 file_filter = public/language/<lang>/users.json
-source_file = public/language/en_GB/users.json
+source_file = public/language/en-GB/users.json
 source_lang = en_GB
 trans.ar = public/language/ar/users.json
 trans.bn = public/language/bn/users.json
@@ -472,11 +472,11 @@ trans.cs = public/language/cs/users.json
 trans.da = public/language/da/users.json
 trans.de = public/language/de/users.json
 trans.el = public/language/el/users.json
-trans.en_US = public/language/en_US/users.json
-trans.en@pirate = public/language/en@pirate/users.json
+trans.en_US = public/language/en-US/users.json
+trans.en@pirate = public/language/en-x-pirate/users.json
 trans.es = public/language/es/users.json
 trans.et = public/language/et/users.json
-trans.fa_IR = public/language/fa_IR/users.json
+trans.fa_IR = public/language/fa-IR/users.json
 trans.fi = public/language/fi/users.json
 trans.fr = public/language/fr/users.json
 trans.gl = public/language/gl/users.json
@@ -491,7 +491,7 @@ trans.ms = public/language/ms/users.json
 trans.nb = public/language/nb/users.json
 trans.nl = public/language/nl/users.json
 trans.pl = public/language/pl/users.json
-trans.pt_BR = public/language/pt_BR/users.json
+trans.pt_BR = public/language/pt-BR/users.json
 trans.ru = public/language/ru/users.json
 trans.ro = public/language/ro/users.json
 trans.rw = public/language/rw/users.json
@@ -503,13 +503,13 @@ trans.sv = public/language/sv/users.json
 trans.th = public/language/th/users.json
 trans.tr = public/language/tr/users.json
 trans.vi = public/language/vi/users.json
-trans.zh_CN = public/language/zh_CN/users.json
-trans.zh_TW = public/language/zh_TW/users.json
+trans.zh_CN = public/language/zh-CN/users.json
+trans.zh_TW = public/language/zh-TW/users.json
 type = KEYVALUEJSON
 
 [nodebb.language-1]
 file_filter = public/language/<lang>/language.json
-source_file = public/language/en_GB/language.json
+source_file = public/language/en-GB/language.json
 source_lang = en_GB
 trans.ar = public/language/ar/language.json
 trans.bn = public/language/bn/language.json
@@ -518,11 +518,11 @@ trans.cs = public/language/cs/language.json
 trans.da = public/language/da/language.json
 trans.de = public/language/de/language.json
 trans.el = public/language/el/language.json
-trans.en_US = public/language/en_US/language.json
-trans.en@pirate = public/language/en@pirate/language.json
+trans.en_US = public/language/en-US/language.json
+trans.en@pirate = public/language/en-x-pirate/language.json
 trans.es = public/language/es/language.json
 trans.et = public/language/et/language.json
-trans.fa_IR = public/language/fa_IR/language.json
+trans.fa_IR = public/language/fa-IR/language.json
 trans.fi = public/language/fi/language.json
 trans.fr = public/language/fr/language.json
 trans.gl = public/language/gl/language.json
@@ -537,7 +537,7 @@ trans.ms = public/language/ms/language.json
 trans.nb = public/language/nb/language.json
 trans.nl = public/language/nl/language.json
 trans.pl = public/language/pl/language.json
-trans.pt_BR = public/language/pt_BR/language.json
+trans.pt_BR = public/language/pt-BR/language.json
 trans.ru = public/language/ru/language.json
 trans.ro = public/language/ro/language.json
 trans.rw = public/language/rw/language.json
@@ -549,13 +549,13 @@ trans.sv = public/language/sv/language.json
 trans.th = public/language/th/language.json
 trans.tr = public/language/tr/language.json
 trans.vi = public/language/vi/language.json
-trans.zh_CN = public/language/zh_CN/language.json
-trans.zh_TW = public/language/zh_TW/language.json
+trans.zh_CN = public/language/zh-CN/language.json
+trans.zh_TW = public/language/zh-TW/language.json
 type = KEYVALUEJSON
 
 [nodebb.pages]
 file_filter = public/language/<lang>/pages.json
-source_file = public/language/en_GB/pages.json
+source_file = public/language/en-GB/pages.json
 source_lang = en_GB
 trans.ar = public/language/ar/pages.json
 trans.bn = public/language/bn/pages.json
@@ -564,11 +564,11 @@ trans.cs = public/language/cs/pages.json
 trans.da = public/language/da/pages.json
 trans.de = public/language/de/pages.json
 trans.el = public/language/el/pages.json
-trans.en_US = public/language/en_US/pages.json
-trans.en@pirate = public/language/en@pirate/pages.json
+trans.en_US = public/language/en-US/pages.json
+trans.en@pirate = public/language/en-x-pirate/pages.json
 trans.es = public/language/es/pages.json
 trans.et = public/language/et/pages.json
-trans.fa_IR = public/language/fa_IR/pages.json
+trans.fa_IR = public/language/fa-IR/pages.json
 trans.fi = public/language/fi/pages.json
 trans.fr = public/language/fr/pages.json
 trans.gl = public/language/gl/pages.json
@@ -583,7 +583,7 @@ trans.ms = public/language/ms/pages.json
 trans.nb = public/language/nb/pages.json
 trans.nl = public/language/nl/pages.json
 trans.pl = public/language/pl/pages.json
-trans.pt_BR = public/language/pt_BR/pages.json
+trans.pt_BR = public/language/pt-BR/pages.json
 trans.ru = public/language/ru/pages.json
 trans.ro = public/language/ro/pages.json
 trans.rw = public/language/rw/pages.json
@@ -595,13 +595,13 @@ trans.sv = public/language/sv/pages.json
 trans.th = public/language/th/pages.json
 trans.tr = public/language/tr/pages.json
 trans.vi = public/language/vi/pages.json
-trans.zh_CN = public/language/zh_CN/pages.json
-trans.zh_TW = public/language/zh_TW/pages.json
+trans.zh_CN = public/language/zh-CN/pages.json
+trans.zh_TW = public/language/zh-TW/pages.json
 type = KEYVALUEJSON
 
 [nodebb.topic]
 file_filter = public/language/<lang>/topic.json
-source_file = public/language/en_GB/topic.json
+source_file = public/language/en-GB/topic.json
 source_lang = en_GB
 trans.ar = public/language/ar/topic.json
 trans.bn = public/language/bn/topic.json
@@ -610,11 +610,11 @@ trans.cs = public/language/cs/topic.json
 trans.da = public/language/da/topic.json
 trans.de = public/language/de/topic.json
 trans.el = public/language/el/topic.json
-trans.en_US = public/language/en_US/topic.json
-trans.en@pirate = public/language/en@pirate/topic.json
+trans.en_US = public/language/en-US/topic.json
+trans.en@pirate = public/language/en-x-pirate/topic.json
 trans.es = public/language/es/topic.json
 trans.et = public/language/et/topic.json
-trans.fa_IR = public/language/fa_IR/topic.json
+trans.fa_IR = public/language/fa-IR/topic.json
 trans.fi = public/language/fi/topic.json
 trans.fr = public/language/fr/topic.json
 trans.gl = public/language/gl/topic.json
@@ -629,7 +629,7 @@ trans.ms = public/language/ms/topic.json
 trans.nb = public/language/nb/topic.json
 trans.nl = public/language/nl/topic.json
 trans.pl = public/language/pl/topic.json
-trans.pt_BR = public/language/pt_BR/topic.json
+trans.pt_BR = public/language/pt-BR/topic.json
 trans.ru = public/language/ru/topic.json
 trans.ro = public/language/ro/topic.json
 trans.rw = public/language/rw/topic.json
@@ -641,13 +641,13 @@ trans.sv = public/language/sv/topic.json
 trans.th = public/language/th/topic.json
 trans.tr = public/language/tr/topic.json
 trans.vi = public/language/vi/topic.json
-trans.zh_CN = public/language/zh_CN/topic.json
-trans.zh_TW = public/language/zh_TW/topic.json
+trans.zh_CN = public/language/zh-CN/topic.json
+trans.zh_TW = public/language/zh-TW/topic.json
 type = KEYVALUEJSON
 
 [nodebb.success]
 file_filter = public/language/<lang>/success.json
-source_file = public/language/en_GB/success.json
+source_file = public/language/en-GB/success.json
 source_lang = en_GB
 trans.ar = public/language/ar/success.json
 trans.bn = public/language/bn/success.json
@@ -656,11 +656,11 @@ trans.cs = public/language/cs/success.json
 trans.da = public/language/da/success.json
 trans.de = public/language/de/success.json
 trans.el = public/language/el/success.json
-trans.en_US = public/language/en_US/success.json
-trans.en@pirate = public/language/en@pirate/success.json
+trans.en_US = public/language/en-US/success.json
+trans.en@pirate = public/language/en-x-pirate/success.json
 trans.es = public/language/es/success.json
 trans.et = public/language/et/success.json
-trans.fa_IR = public/language/fa_IR/success.json
+trans.fa_IR = public/language/fa-IR/success.json
 trans.fi = public/language/fi/success.json
 trans.fr = public/language/fr/success.json
 trans.gl = public/language/gl/success.json
@@ -675,7 +675,7 @@ trans.ms = public/language/ms/success.json
 trans.nb = public/language/nb/success.json
 trans.nl = public/language/nl/success.json
 trans.pl = public/language/pl/success.json
-trans.pt_BR = public/language/pt_BR/success.json
+trans.pt_BR = public/language/pt-BR/success.json
 trans.ru = public/language/ru/success.json
 trans.ro = public/language/ro/success.json
 trans.rw = public/language/rw/success.json
@@ -687,13 +687,13 @@ trans.sv = public/language/sv/success.json
 trans.th = public/language/th/success.json
 trans.tr = public/language/tr/success.json
 trans.vi = public/language/vi/success.json
-trans.zh_CN = public/language/zh_CN/success.json
-trans.zh_TW = public/language/zh_TW/success.json
+trans.zh_CN = public/language/zh-CN/success.json
+trans.zh_TW = public/language/zh-TW/success.json
 type = KEYVALUEJSON
 
 [nodebb.error]
 file_filter = public/language/<lang>/error.json
-source_file = public/language/en_GB/error.json
+source_file = public/language/en-GB/error.json
 source_lang = en_GB
 trans.ar = public/language/ar/error.json
 trans.bn = public/language/bn/error.json
@@ -702,11 +702,11 @@ trans.cs = public/language/cs/error.json
 trans.da = public/language/da/error.json
 trans.de = public/language/de/error.json
 trans.el = public/language/el/error.json
-trans.en_US = public/language/en_US/error.json
-trans.en@pirate = public/language/en@pirate/error.json
+trans.en_US = public/language/en-US/error.json
+trans.en@pirate = public/language/en-x-pirate/error.json
 trans.es = public/language/es/error.json
 trans.et = public/language/et/error.json
-trans.fa_IR = public/language/fa_IR/error.json
+trans.fa_IR = public/language/fa-IR/error.json
 trans.fi = public/language/fi/error.json
 trans.fr = public/language/fr/error.json
 trans.gl = public/language/gl/error.json
@@ -721,7 +721,7 @@ trans.ms = public/language/ms/error.json
 trans.nb = public/language/nb/error.json
 trans.nl = public/language/nl/error.json
 trans.pl = public/language/pl/error.json
-trans.pt_BR = public/language/pt_BR/error.json
+trans.pt_BR = public/language/pt-BR/error.json
 trans.ru = public/language/ru/error.json
 trans.ro = public/language/ro/error.json
 trans.rw = public/language/rw/error.json
@@ -733,13 +733,13 @@ trans.sv = public/language/sv/error.json
 trans.th = public/language/th/error.json
 trans.tr = public/language/tr/error.json
 trans.vi = public/language/vi/error.json
-trans.zh_CN = public/language/zh_CN/error.json
-trans.zh_TW = public/language/zh_TW/error.json
+trans.zh_CN = public/language/zh-CN/error.json
+trans.zh_TW = public/language/zh-TW/error.json
 type = KEYVALUEJSON
 
 [nodebb.tags]
 file_filter = public/language/<lang>/tags.json
-source_file = public/language/en_GB/tags.json
+source_file = public/language/en-GB/tags.json
 source_lang = en_GB
 trans.ar = public/language/ar/tags.json
 trans.bn = public/language/bn/tags.json
@@ -748,11 +748,11 @@ trans.cs = public/language/cs/tags.json
 trans.da = public/language/da/tags.json
 trans.de = public/language/de/tags.json
 trans.el = public/language/el/tags.json
-trans.en_US = public/language/en_US/tags.json
-trans.en@pirate = public/language/en@pirate/tags.json
+trans.en_US = public/language/en-US/tags.json
+trans.en@pirate = public/language/en-x-pirate/tags.json
 trans.es = public/language/es/tags.json
 trans.et = public/language/et/tags.json
-trans.fa_IR = public/language/fa_IR/tags.json
+trans.fa_IR = public/language/fa-IR/tags.json
 trans.fi = public/language/fi/tags.json
 trans.fr = public/language/fr/tags.json
 trans.gl = public/language/gl/tags.json
@@ -767,7 +767,7 @@ trans.ms = public/language/ms/tags.json
 trans.nb = public/language/nb/tags.json
 trans.nl = public/language/nl/tags.json
 trans.pl = public/language/pl/tags.json
-trans.pt_BR = public/language/pt_BR/tags.json
+trans.pt_BR = public/language/pt-BR/tags.json
 trans.ru = public/language/ru/tags.json
 trans.ro = public/language/ro/tags.json
 trans.rw = public/language/rw/tags.json
@@ -779,13 +779,13 @@ trans.sv = public/language/sv/tags.json
 trans.th = public/language/th/tags.json
 trans.tr = public/language/tr/tags.json
 trans.vi = public/language/vi/tags.json
-trans.zh_CN = public/language/zh_CN/tags.json
-trans.zh_TW = public/language/zh_TW/tags.json
+trans.zh_CN = public/language/zh-CN/tags.json
+trans.zh_TW = public/language/zh-TW/tags.json
 type = KEYVALUEJSON
 
 [nodebb.email]
 file_filter = public/language/<lang>/email.json
-source_file = public/language/en_GB/email.json
+source_file = public/language/en-GB/email.json
 source_lang = en_GB
 trans.ar = public/language/ar/email.json
 trans.bn = public/language/bn/email.json
@@ -794,11 +794,11 @@ trans.cs = public/language/cs/email.json
 trans.da = public/language/da/email.json
 trans.de = public/language/de/email.json
 trans.el = public/language/el/email.json
-trans.en_US = public/language/en_US/email.json
-trans.en@pirate = public/language/en@pirate/email.json
+trans.en_US = public/language/en-US/email.json
+trans.en@pirate = public/language/en-x-pirate/email.json
 trans.es = public/language/es/email.json
 trans.et = public/language/et/email.json
-trans.fa_IR = public/language/fa_IR/email.json
+trans.fa_IR = public/language/fa-IR/email.json
 trans.fi = public/language/fi/email.json
 trans.fr = public/language/fr/email.json
 trans.gl = public/language/gl/email.json
@@ -813,7 +813,7 @@ trans.ms = public/language/ms/email.json
 trans.nb = public/language/nb/email.json
 trans.nl = public/language/nl/email.json
 trans.pl = public/language/pl/email.json
-trans.pt_BR = public/language/pt_BR/email.json
+trans.pt_BR = public/language/pt-BR/email.json
 trans.ru = public/language/ru/email.json
 trans.ro = public/language/ro/email.json
 trans.rw = public/language/rw/email.json
@@ -825,13 +825,13 @@ trans.sv = public/language/sv/email.json
 trans.th = public/language/th/email.json
 trans.tr = public/language/tr/email.json
 trans.vi = public/language/vi/email.json
-trans.zh_CN = public/language/zh_CN/email.json
-trans.zh_TW = public/language/zh_TW/email.json
+trans.zh_CN = public/language/zh-CN/email.json
+trans.zh_TW = public/language/zh-TW/email.json
 type = KEYVALUEJSON
 
 [nodebb.search]
 file_filter = public/language/<lang>/search.json
-source_file = public/language/en_GB/search.json
+source_file = public/language/en-GB/search.json
 source_lang = en_GB
 trans.ar = public/language/ar/search.json
 trans.bn = public/language/bn/search.json
@@ -840,11 +840,11 @@ trans.cs = public/language/cs/search.json
 trans.da = public/language/da/search.json
 trans.de = public/language/de/search.json
 trans.el = public/language/el/search.json
-trans.en_US = public/language/en_US/search.json
-trans.en@pirate = public/language/en@pirate/search.json
+trans.en_US = public/language/en-US/search.json
+trans.en@pirate = public/language/en-x-pirate/search.json
 trans.es = public/language/es/search.json
 trans.et = public/language/et/search.json
-trans.fa_IR = public/language/fa_IR/search.json
+trans.fa_IR = public/language/fa-IR/search.json
 trans.fi = public/language/fi/search.json
 trans.fr = public/language/fr/search.json
 trans.gl = public/language/gl/search.json
@@ -859,7 +859,7 @@ trans.ms = public/language/ms/search.json
 trans.nb = public/language/nb/search.json
 trans.nl = public/language/nl/search.json
 trans.pl = public/language/pl/search.json
-trans.pt_BR = public/language/pt_BR/search.json
+trans.pt_BR = public/language/pt-BR/search.json
 trans.ru = public/language/ru/search.json
 trans.ro = public/language/ro/search.json
 trans.rw = public/language/rw/search.json
@@ -871,13 +871,13 @@ trans.sv = public/language/sv/search.json
 trans.th = public/language/th/search.json
 trans.tr = public/language/tr/search.json
 trans.vi = public/language/vi/search.json
-trans.zh_CN = public/language/zh_CN/search.json
-trans.zh_TW = public/language/zh_TW/search.json
+trans.zh_CN = public/language/zh-CN/search.json
+trans.zh_TW = public/language/zh-TW/search.json
 type = KEYVALUEJSON
 
 [nodebb.groups]
 file_filter = public/language/<lang>/groups.json
-source_file = public/language/en_GB/groups.json
+source_file = public/language/en-GB/groups.json
 source_lang = en_GB
 trans.ar = public/language/ar/groups.json
 trans.bn = public/language/bn/groups.json
@@ -886,11 +886,11 @@ trans.cs = public/language/cs/groups.json
 trans.da = public/language/da/groups.json
 trans.de = public/language/de/groups.json
 trans.el = public/language/el/groups.json
-trans.en_US = public/language/en_US/groups.json
-trans.en@pirate = public/language/en@pirate/groups.json
+trans.en_US = public/language/en-US/groups.json
+trans.en@pirate = public/language/en-x-pirate/groups.json
 trans.es = public/language/es/groups.json
 trans.et = public/language/et/groups.json
-trans.fa_IR = public/language/fa_IR/groups.json
+trans.fa_IR = public/language/fa-IR/groups.json
 trans.fi = public/language/fi/groups.json
 trans.fr = public/language/fr/groups.json
 trans.gl = public/language/gl/groups.json
@@ -905,7 +905,7 @@ trans.ms = public/language/ms/groups.json
 trans.nb = public/language/nb/groups.json
 trans.nl = public/language/nl/groups.json
 trans.pl = public/language/pl/groups.json
-trans.pt_BR = public/language/pt_BR/groups.json
+trans.pt_BR = public/language/pt-BR/groups.json
 trans.ru = public/language/ru/groups.json
 trans.ro = public/language/ro/groups.json
 trans.rw = public/language/rw/groups.json
@@ -917,13 +917,13 @@ trans.sv = public/language/sv/groups.json
 trans.th = public/language/th/groups.json
 trans.tr = public/language/tr/groups.json
 trans.vi = public/language/vi/groups.json
-trans.zh_CN = public/language/zh_CN/groups.json
-trans.zh_TW = public/language/zh_TW/groups.json
+trans.zh_CN = public/language/zh-CN/groups.json
+trans.zh_TW = public/language/zh-TW/groups.json
 type = KEYVALUEJSON
 
 [nodebb.uploads]
 file_filter = public/language/<lang>/uploads.json
-source_file = public/language/en_GB/uploads.json
+source_file = public/language/en-GB/uploads.json
 source_lang = en_GB
 trans.ar = public/language/ar/uploads.json
 trans.bn = public/language/bn/uploads.json
@@ -932,11 +932,11 @@ trans.cs = public/language/cs/uploads.json
 trans.da = public/language/da/uploads.json
 trans.de = public/language/de/uploads.json
 trans.el = public/language/el/uploads.json
-trans.en_US = public/language/en_US/uploads.json
-trans.en@pirate = public/language/en@pirate/uploads.json
+trans.en_US = public/language/en-US/uploads.json
+trans.en@pirate = public/language/en-x-pirate/uploads.json
 trans.es = public/language/es/uploads.json
 trans.et = public/language/et/uploads.json
-trans.fa_IR = public/language/fa_IR/uploads.json
+trans.fa_IR = public/language/fa-IR/uploads.json
 trans.fi = public/language/fi/uploads.json
 trans.fr = public/language/fr/uploads.json
 trans.gl = public/language/gl/uploads.json
@@ -951,7 +951,7 @@ trans.ms = public/language/ms/uploads.json
 trans.nb = public/language/nb/uploads.json
 trans.nl = public/language/nl/uploads.json
 trans.pl = public/language/pl/uploads.json
-trans.pt_BR = public/language/pt_BR/uploads.json
+trans.pt_BR = public/language/pt-BR/uploads.json
 trans.ru = public/language/ru/uploads.json
 trans.ro = public/language/ro/uploads.json
 trans.rw = public/language/rw/uploads.json
@@ -963,6 +963,6 @@ trans.sv = public/language/sv/uploads.json
 trans.th = public/language/th/uploads.json
 trans.tr = public/language/tr/uploads.json
 trans.vi = public/language/vi/uploads.json
-trans.zh_CN = public/language/zh_CN/uploads.json
-trans.zh_TW = public/language/zh_TW/uploads.json
+trans.zh_CN = public/language/zh-CN/uploads.json
+trans.zh_TW = public/language/zh-TW/uploads.json
 type = KEYVALUEJSON

public/language/en-GB/language.json

@@ -1,5 +1,5 @@
 {
 	"name": "English (United Kingdom/Canada)",
-	"code": "en_GB",
+	"code": "en-GB",
 	"dir": "ltr"
 }

public/language/en-US/language.json

@@ -1,5 +1,5 @@
 {
     "name": "English (United States)",
-    "code": "en_US",
+    "code": "en-US",
     "dir": "ltr"
 }

public/language/en-x-pirate/language.json

@@ -1,5 +1,5 @@
 {
     "name": "English (Pirate)",
-    "code": "en@pirate",
+    "code": "en-x-pirate",
     "dir": "ltr"
 }

public/language/fa-IR/language.json

@@ -1,5 +1,5 @@
 {
     "name": "فارسی",
-    "code": "fa_IR",
+    "code": "fa-IR",
     "dir": "rtl"
 }

public/language/pt-BR/language.json

@@ -1,5 +1,5 @@
 {
     "name": "Português (Brasil)",
-    "code": "pt_BR",
+    "code": "pt-BR",
     "dir": "ltr"
 }