diff --git a/doc/weechat_doc_es.texi b/doc/weechat_doc_es.texi
index 40bcddb49..4007934de 100644
--- a/doc/weechat_doc_es.texi
+++ b/doc/weechat_doc_es.texi
@@ -30,6 +30,7 @@
 @c end tex
 
 @documentlanguage es
+@documentlanguage ISO-8859-1
 
 @titlepage
 
diff --git a/doc/weechat_doc_fr.texi b/doc/weechat_doc_fr.texi
index 763815c91..8bc1f74e3 100644
--- a/doc/weechat_doc_fr.texi
+++ b/doc/weechat_doc_fr.texi
@@ -30,6 +30,7 @@
 @c end tex
 
 @documentlanguage fr
+@documentencoding ISO-8859-1
 
 @titlepage
 
diff --git a/doc/weechat_doc_pt.texi b/doc/weechat_doc_pt.texi
index fa977da9d..1f58e2465 100644
--- a/doc/weechat_doc_pt.texi
+++ b/doc/weechat_doc_pt.texi
@@ -30,6 +30,7 @@
 @c end tex
 
 @documentlanguage pt
+@documentlanguage ISO-8859-1
 
 @titlepage
 
diff --git a/weechat/doc/weechat_doc_es.texi b/weechat/doc/weechat_doc_es.texi
index 40bcddb49..4007934de 100644
--- a/weechat/doc/weechat_doc_es.texi
+++ b/weechat/doc/weechat_doc_es.texi
@@ -30,6 +30,7 @@
 @c end tex
 
 @documentlanguage es
+@documentlanguage ISO-8859-1
 
 @titlepage
 
diff --git a/weechat/doc/weechat_doc_fr.texi b/weechat/doc/weechat_doc_fr.texi
index 763815c91..8bc1f74e3 100644
--- a/weechat/doc/weechat_doc_fr.texi
+++ b/weechat/doc/weechat_doc_fr.texi
@@ -30,6 +30,7 @@
 @c end tex
 
 @documentlanguage fr
+@documentencoding ISO-8859-1
 
 @titlepage
 
diff --git a/weechat/doc/weechat_doc_pt.texi b/weechat/doc/weechat_doc_pt.texi
index fa977da9d..1f58e2465 100644
--- a/weechat/doc/weechat_doc_pt.texi
+++ b/weechat/doc/weechat_doc_pt.texi
@@ -30,6 +30,7 @@
 @c end tex
 
 @documentlanguage pt
+@documentlanguage ISO-8859-1
 
 @titlepage