diff --git a/doc/org.texi b/doc/org.texi
index 05bc48774..007f92289 100644
--- a/doc/org.texi
+++ b/doc/org.texi
@@ -10273,7 +10273,7 @@ for display purposes only.
 @cindex dash, special symbol
 @cindex ellipsis, special symbol
 In addition to regular entities defined above, Org exports in a special
-way@footnote{This behaviour can be disabled with @code{-} export setting
+way@footnote{This behavior can be disabled with @code{-} export setting
 (@pxref{Export settings}).} the following commonly used character
 combinations: @samp{\-} is treated as a shy hyphen, @samp{--} and @samp{---}
 are converted into dashes, and @samp{...} becomes a compact set of dots.
diff --git a/etc/ORG-NEWS b/etc/ORG-NEWS
index da189eed5..dbedbf7c9 100644
--- a/etc/ORG-NEWS
+++ b/etc/ORG-NEWS
@@ -1607,7 +1607,7 @@ don't have to be distinct on a heading.
 
 Grouptags had to previously be defined with { }.  This syntax is
 already used for exclusive tags and Grouptags need their own,
-non-exclusive syntax.  This behaviour is achieved with [ ].  Note: { }
+non-exclusive syntax.  This behavior is achieved with [ ].  Note: { }
 can still be used also for Grouptags but then only one of the given
 tags can be used on the headline at the same time.  Example:
 
@@ -1671,9 +1671,9 @@ Check the documentation for more details.
 
 Thanks to Jarmo Hurri for this feature.
 
-*** New behaviour for ~org-toggle-latex-fragment~
+*** New behavior for ~org-toggle-latex-fragment~
 
-The new behaviour is the following:
+The new behavior is the following:
 
 - With a double prefix argument or with a single prefix argument when
   point is before the first headline, toggle overlays in the whole
@@ -1872,10 +1872,10 @@ leading spaces within table cells.
 Org uses the MathJax CDN by default.  See the manual and the docstring
 of ~org-html-mathjax-options~ for details.
 
-*** New behaviour in `org-export-options-alist'
+*** New behavior in `org-export-options-alist'
 
 When defining a back-end, it is now possible to specify to give
-`parse' behaviour on a keyword.  It is equivalent to call
+`parse' behavior on a keyword.  It is equivalent to call
 `org-element-parse-secondary-string' on the value.
 
 However, parsed =KEYWORD= is automatically associated to an
@@ -1994,7 +1994,7 @@ everywhere in the buffer, possibly corrupting URLs.
 *** Removed option =org-babel-sh-command=
 
 This undocumented option defaulted to the value of =shell-file-name= at
-the time of loading =ob-shell=.  The new behaviour is to use the value
+the time of loading =ob-shell=.  The new behavior is to use the value
 of =shell-file-name= directly when the shell langage is =shell=.  To chose
 a different shell, either customize =shell-file-name= or bind this
 variable locally.
diff --git a/lisp/org-element.el b/lisp/org-element.el
index 5c1840746..3bd3a6f01 100644
--- a/lisp/org-element.el
+++ b/lisp/org-element.el
@@ -4766,7 +4766,7 @@ indentation removed from its contents."
 ;; Cache is enabled by default, but can be disabled globally with
 ;; `org-element-use-cache'.  `org-element-cache-sync-idle-time',
 ;; org-element-cache-sync-duration' and `org-element-cache-sync-break'
-;; can be tweaked to control caching behaviour.
+;; can be tweaked to control caching behavior.
 ;;
 ;; Internally, parsed elements are stored in an AVL tree,
 ;; `org-element--cache'.  This tree is updated lazily: whenever
diff --git a/lisp/org.el b/lisp/org.el
index a221725da..ac1ad3c75 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -10130,7 +10130,7 @@ a timestamp or a link."
 		   (save-excursion
 		     ;; Do not validate action when point is on the
 		     ;; spaces right after the footnote label, in
-		     ;; order to be on par with behaviour on links.
+		     ;; order to be on par with behavior on links.
 		     (skip-chars-forward " \t")
 		     (let ((begin
 			    (org-element-property :contents-begin context)))
@@ -10283,7 +10283,7 @@ there is one, return it."
        (cons link end)))))
 
 ;; TODO: These functions are deprecated since `org-open-at-point'
-;; hard-codes behaviour for "file+emacs" and "file+sys" types.
+;; hard-codes behavior for "file+emacs" and "file+sys" types.
 (defun org-open-file-with-system (path)
   "Open file at PATH using the system way of opening it."
   (org-open-file path 'system))