diff --git a/doc/en/weechat_plugin_api.en.adoc b/doc/en/weechat_plugin_api.en.adoc
index 5584571d2..b6984f54e 100644
--- a/doc/en/weechat_plugin_api.en.adoc
+++ b/doc/en/weechat_plugin_api.en.adoc
@@ -5844,7 +5844,13 @@ int weechat_config_option_set (struct t_config_option *option,
 Arguments:
 
 * _option_: option pointer
-* _value_: new value for option
+* _value_: new value for option, special values are possible according to the
+  type of option:
+** _boolean_:
+*** `toggle`: toggle the current value
+** _integer_ or _color_:
+*** `++N`: add `N` (any integer) to the current value
+*** `--N`: subtract `N` (any integer) from the current value
 * _run_callback_: 1 for calling change callback if value of option is changed,
   otherwise 0
 
diff --git a/doc/fr/weechat_plugin_api.fr.adoc b/doc/fr/weechat_plugin_api.fr.adoc
index 2725b6032..d8e635b81 100644
--- a/doc/fr/weechat_plugin_api.fr.adoc
+++ b/doc/fr/weechat_plugin_api.fr.adoc
@@ -5941,7 +5941,13 @@ int weechat_config_option_set (struct t_config_option *option,
 Paramètres :
 
 * _option_ : pointeur vers l'option
-* _value_ : nouvelle valeur pour l'option
+* _value_ : nouvelle valeur pour l'option, des valeurs spéciales sont possibles
+  selon le type de l'option :
+** _boolean_ :
+*** `toggle` : basculer la valeur courante
+** _integer_ ou _color_ :
+*** `++N` : ajouter `N` (un entier) à la valeur courante
+*** `--N` : soustraire `N` (un entier) de la valeur courante
 * _run_callback_ : 1 pour appeler la fonction de rappel si la valeur de
   l'option est changée, sinon 0
 
diff --git a/doc/it/weechat_plugin_api.it.adoc b/doc/it/weechat_plugin_api.it.adoc
index 65def0b48..b2a8d78c3 100644
--- a/doc/it/weechat_plugin_api.it.adoc
+++ b/doc/it/weechat_plugin_api.it.adoc
@@ -6034,7 +6034,19 @@ int weechat_config_option_set (struct t_config_option *option,
 Argomenti:
 
 * _option_: puntatore all'opzione
-* _value_: nuovo valore per l'opzione
+// TRANSLATION MISSING
+* _value_: new value for option, special values are possible according to the
+  type of option:
+// TRANSLATION MISSING
+** _boolean_:
+// TRANSLATION MISSING
+*** `toggle`: toggle the current value
+// TRANSLATION MISSING
+** _integer_ or _color_:
+// TRANSLATION MISSING
+*** `++N`: add `N` (any integer) to the current value
+// TRANSLATION MISSING
+*** `--N`: subtract `N` (any integer) from the current value
 * _run_callback_: 1 per la chiamata alla callback chang se il valore dell'opzione
   è cambiato, altrimenti 0
 
diff --git a/doc/ja/weechat_plugin_api.ja.adoc b/doc/ja/weechat_plugin_api.ja.adoc
index a52c3832c..3dc687204 100644
--- a/doc/ja/weechat_plugin_api.ja.adoc
+++ b/doc/ja/weechat_plugin_api.ja.adoc
@@ -5848,7 +5848,19 @@ int weechat_config_option_set (struct t_config_option *option,
 引数:
 
 * _option_: オプションへのポインタ
-* _value_: オプションの新しい値
+// TRANSLATION MISSING
+* _value_: new value for option, special values are possible according to the
+  type of option:
+// TRANSLATION MISSING
+** _boolean_:
+// TRANSLATION MISSING
+*** `toggle`: toggle the current value
+// TRANSLATION MISSING
+** _integer_ or _color_:
+// TRANSLATION MISSING
+*** `++N`: add `N` (any integer) to the current value
+// TRANSLATION MISSING
+*** `--N`: subtract `N` (any integer) from the current value
 * _run_callback_: オプションが変更された際に、_callback_change_ コールバックを呼び出す場合は
   1、呼び出さない場合は 0