diff --git a/ChangeLog.adoc b/ChangeLog.adoc
index 4696879f5..d53df1cec 100644
--- a/ChangeLog.adoc
+++ b/ChangeLog.adoc
@@ -22,6 +22,10 @@ Bug fixes::
 
   * python: fix crash when invalid UTF-8 string is in a WeeChat hashtable converted to a Python dict (issue #1463)
 
+Documentation::
+
+  * fix broken literal blocks in Japanese docs with Firefox (issue #1466)
+
 Tests::
 
   * irc: add tests on IRC color functions
diff --git a/doc/ja/weechat-headless.1.ja.adoc b/doc/ja/weechat-headless.1.ja.adoc
index f3e219cea..0b7a44dfd 100644
--- a/doc/ja/weechat-headless.1.ja.adoc
+++ b/doc/ja/weechat-headless.1.ja.adoc
@@ -2,7 +2,7 @@
 :doctype: manpage
 :author: Sébastien Helleu
 :email: flashcode@flashtux.org
-:lang: ja
+:lang: ja-jp
 :man manual: WeeChat マニュアル
 :man source: WeeChat {revnumber}
 
diff --git a/doc/ja/weechat.1.ja.adoc b/doc/ja/weechat.1.ja.adoc
index 82fcd9830..b79b2a985 100644
--- a/doc/ja/weechat.1.ja.adoc
+++ b/doc/ja/weechat.1.ja.adoc
@@ -2,7 +2,7 @@
 :doctype: manpage
 :author: Sébastien Helleu
 :email: flashcode@flashtux.org
-:lang: ja
+:lang: ja-jp
 :man manual: WeeChat マニュアル
 :man source: WeeChat {revnumber}
 
diff --git a/doc/ja/weechat_dev.ja.adoc b/doc/ja/weechat_dev.ja.adoc
index 3e1544d05..0e4170314 100644
--- a/doc/ja/weechat_dev.ja.adoc
+++ b/doc/ja/weechat_dev.ja.adoc
@@ -1,7 +1,7 @@
 = WeeChat 開発者ガイド
 :author: Sébastien Helleu
 :email: flashcode@flashtux.org
-:lang: ja
+:lang: ja-jp
 :toc: left
 :toclevels: 3
 :toc-title: 目次
diff --git a/doc/ja/weechat_faq.ja.adoc b/doc/ja/weechat_faq.ja.adoc
index 916151a65..bc2c7faf8 100644
--- a/doc/ja/weechat_faq.ja.adoc
+++ b/doc/ja/weechat_faq.ja.adoc
@@ -1,7 +1,7 @@
 = WeeChat FAQ (よくある質問)
 :author: Sébastien Helleu
 :email: flashcode@flashtux.org
-:lang: ja
+:lang: ja-jp
 :toc: left
 :toc-title: 目次
 :toclevels: 2
diff --git a/doc/ja/weechat_plugin_api.ja.adoc b/doc/ja/weechat_plugin_api.ja.adoc
index 54c3148cb..5e260edaf 100644
--- a/doc/ja/weechat_plugin_api.ja.adoc
+++ b/doc/ja/weechat_plugin_api.ja.adoc
@@ -1,7 +1,7 @@
 = WeeChat プラグイン API リファレンス
 :author: Sébastien Helleu
 :email: flashcode@flashtux.org
-:lang: ja
+:lang: ja-jp
 :toc: left
 :toclevels: 4
 :toc-title: 目次
diff --git a/doc/ja/weechat_quickstart.ja.adoc b/doc/ja/weechat_quickstart.ja.adoc
index f575b7d79..0f8324bca 100644
--- a/doc/ja/weechat_quickstart.ja.adoc
+++ b/doc/ja/weechat_quickstart.ja.adoc
@@ -1,7 +1,7 @@
 = WeeChat クイックスタートガイド
 :author: Sébastien Helleu
 :email: flashcode@flashtux.org
-:lang: ja
+:lang: ja-jp
 :toc: left
 :toc-title: 目次
 :sectnums:
diff --git a/doc/ja/weechat_relay_protocol.ja.adoc b/doc/ja/weechat_relay_protocol.ja.adoc
index e8188dbb4..1a10f5047 100644
--- a/doc/ja/weechat_relay_protocol.ja.adoc
+++ b/doc/ja/weechat_relay_protocol.ja.adoc
@@ -1,7 +1,7 @@
 = WeeChat リレープロトコル
 :author: Sébastien Helleu
 :email: flashcode@flashtux.org
-:lang: ja
+:lang: ja-jp
 :toc: left
 :toclevels: 3
 :toc-title: 目次
diff --git a/doc/ja/weechat_scripting.ja.adoc b/doc/ja/weechat_scripting.ja.adoc
index 9fe2e3fb3..f5e0c315e 100644
--- a/doc/ja/weechat_scripting.ja.adoc
+++ b/doc/ja/weechat_scripting.ja.adoc
@@ -1,7 +1,7 @@
 = WeeChat スクリプト作成ガイド
 :author: Sébastien Helleu
 :email: flashcode@flashtux.org
-:lang: ja
+:lang: ja-jp
 :toc: left
 :toclevels: 4
 :toc-title: 目次
diff --git a/doc/ja/weechat_tester.ja.adoc b/doc/ja/weechat_tester.ja.adoc
index bae69090c..63a5de7c1 100644
--- a/doc/ja/weechat_tester.ja.adoc
+++ b/doc/ja/weechat_tester.ja.adoc
@@ -1,7 +1,7 @@
 = WeeChat テスターガイド
 :author: Sébastien Helleu
 :email: flashcode@flashtux.org
-:lang: ja
+:lang: ja-jp
 :toc: left
 :toc-title: 目次
 :sectnums:
diff --git a/doc/ja/weechat_user.ja.adoc b/doc/ja/weechat_user.ja.adoc
index 20541fef2..19ece8c40 100644
--- a/doc/ja/weechat_user.ja.adoc
+++ b/doc/ja/weechat_user.ja.adoc
@@ -1,7 +1,7 @@
 = WeeChat ユーザーズガイド
 :author: Sébastien Helleu
 :email: flashcode@flashtux.org
-:lang: ja
+:lang: ja-jp
 :toc: left
 :toclevels: 4
 :toc-title: 目次