diff --git a/NEWS b/NEWS
index 78defb2e6..8998f3180 100644
--- a/NEWS
+++ b/NEWS
@@ -135,7 +135,7 @@ FlashCo+ │ test       # 8, off
 
 After `/upgrade`, if you set new options to non-empty strings, and if old
 options were set to non-empty strings too, you will see double prefix/suffix
-on old messages, this is normal behaviour (lines displayed before `/upgrade`
+on old messages, this is normal behavior (lines displayed before `/upgrade`
 have prefix/suffix saved in prefix, but new lines don't have them any more).
 
 New options in logger plugin (logger.conf):
diff --git a/doc/en/weechat_plugin_api.en.txt b/doc/en/weechat_plugin_api.en.txt
index 03e042876..639b92d02 100644
--- a/doc/en/weechat_plugin_api.en.txt
+++ b/doc/en/weechat_plugin_api.en.txt
@@ -1724,7 +1724,7 @@ Arguments:
 * 'extra_vars': extra variables that will be expanded (can be NULL)
 * 'options': a hashtable with some options (keys and values must be string)
   (can be NULL):
-** 'type': default behaviour is just to replace values in expression, other
+** 'type': default behavior is just to replace values in expression, other
    types can be selected:
 *** 'condition': the expression is evaluated as a condition: operators and
     parentheses are used, result is a boolean ("0" or "1")
diff --git a/doc/it/weechat_plugin_api.it.txt b/doc/it/weechat_plugin_api.it.txt
index e2267e4a6..4a5f2bf08 100644
--- a/doc/it/weechat_plugin_api.it.txt
+++ b/doc/it/weechat_plugin_api.it.txt
@@ -1711,7 +1711,7 @@ Argomenti:
 * 'extra_vars': extra variables that will be expanded (can be NULL)
 * 'options': a hashtable with some options (keys and values must be string)
   (can be NULL):
-** 'type': default behaviour is just to replace values in expression, other
+** 'type': default behavior is just to replace values in expression, other
    types can be selected:
 *** 'condition': the expression is evaluated as a condition: operators and
     parentheses are used, result is a boolean ("0" or "1")