我做了类似的事情。它是法文，但代码应能说明一切。我使用‰标记（我使用bepo布局），然后使用标记的文本作为按钮样式。
我的口语不流利，所以可能还有改进的余地。
我所做的是，当‰用于标记时，标记的文本具有按钮式的样式，并且在导出时将其翻译为<kbd>
首先，我必须定义一张新面孔：
(defface my-face-org-keystroke
'((t (:inherit shadow
:box (:line-width -2 ;neg. in order to keep the same size of lines
:color "grey75"
:style pressed-button)))) "Face for keystrokes"
:group 'org-faces)
然后自定义 org-emphasis-alist：
(("*" bold)
("/" italic)
("_" underline)
("=" org-code verbatim)
("~" org-verbatim verbatim)
("+"
(:strike-through t))
("‰" my-face-org-keystroke verbatim));This line is what you want to add
对于出口，你可能需要载入ox.el用(require 'ox)。
然后，每次bold或code出现在一个函数中（ox-org.el），我都创建了一个类似的函数（或修改了现有函数）：
;creation
(defun org-html-keystroke (keystroke contents info)
"Transcode KEYSTROKE from Org to HTML.
CONTENTS is nil. INFO is a plist holding contextual
information."
(format (or (cdr (assq 'my-object-keystroke org-html-text-markup-alist)) "%s")
(org-html-encode-plain-text (org-element-property :value keystroke))))
;creation
(defun org-element-my-object-keystroke-parser ()
"Parse code object at point.
Return a list whose CAR is `my-object-keystroke' and CDR is a plist with
`:value', `:begin', `:end' and `:post-blank' keywords.
Assume point is at the first tilde marker."
(interactive)
(save-excursion
(unless (bolp) (backward-char 1))
(looking-at org-emph-re)
(let ((begin (match-beginning 2))
(value (org-match-string-no-properties 4))
(post-blank (progn (goto-char (match-end 2))
(skip-chars-forward " \t")))
(end (point)))
(list 'my-object-keystroke
(list :value value
:begin begin
:end end
:post-blank post-blank)))))
;creation
(defun org-element-my-object-keystroke-interpreter (keystroke contents)
"Interpret KEYSTROKE object as Org syntax.
CONTENTS is nil."
(format "‰%s‰" (org-element-property :value keystroke)))
;modification
(defconst org-element-object-successor-alist
'((subscript . sub/superscript) (superscript . sub/superscript)
(bold . text-markup) (code . text-markup) (italic . text-markup)
(strike-through . text-markup) (underline . text-markup)
(verbatim . text-markup) (entity . latex-or-entity)
(latex-fragment . latex-or-entity) (my-object-keystroke . text-markup))
"Alist of translations between object type and successor name.
Sharing the same successor comes handy when, for example, the
regexp matching one object can also match the other object.")
;modification
(defconst org-element-all-objects
'(bold code entity export-snippet footnote-reference inline-babel-call
inline-src-block italic line-break latex-fragment link macro
radio-target statistics-cookie strike-through subscript superscript
table-cell target timestamp underline verbatim my-object-keystroke)
"Complete list of object types.")
;modification
(defun org-element-text-markup-successor ()
"Search for the next text-markup object.
Return value is a cons cell whose CAR is a symbol among `bold',
`italic', `underline', `strike-through', `code' and `verbatim'
and CDR is beginning position."
(save-excursion
(unless (bolp) (backward-char))
(when (re-search-forward org-emph-re nil t)
(let ((marker (match-string 3)))
(cons (cond
((equal marker "*") 'bold)
((equal marker "/") 'italic)
((equal marker "_") 'underline)
((equal marker "+") 'strike-through)
((equal marker "~") 'code)
((equal marker "=") 'verbatim)
((equal marker "‰") 'my-object-keystroke)
(t (error "Unknown marker at %d" (match-beginning 3))))
(match-beginning 2))))))
接下来，我my-html为导出定义了一个后端：
(org-export-define-derived-backend 'my-html 'html
:translate-alist '((my-object-keystroke . org-html-keystroke))
:menu-entry ' (?h 1
((?r "my-html" org-html-export-to-my-html))))
(defun org-html-export-to-my-html
(&optional async subtreep visible-only body-only ext-plist)
"Export current buffer to a HTML file.
Return output file's name."
(interactive)
(let* ((extension (concat "." org-html-extension))
(file (org-export-output-file-name extension subtreep))
(org-export-coding-system org-html-coding-system))
(org-export-to-file 'my-html file
async subtreep visible-only body-only ext-plist)))
(defun org-html-publish-to-my-html (plist filename pub-dir)
"Publish an org file to my-html.
Return output file name."
(org-publish-org-to 'my-html filename
(concat "." (or (plist-get plist :html-extension)
org-html-extension "html"))
plist pub-dir))
(defun org-html-convert-region-to-my-html ()
"Assume the current region has org-mode syntax, and convert it to HTML.
This can be used in any buffer. For example, you can write an
itemized list in org-mode syntax in an HTML buffer and use this
command to convert it."
(interactive)
(org-export-replace-region-by 'my-html))
因此，当我使用C-c C-e h r它时，可以正确导出：
如OP在注释中所建议，您可能需要使用org-mode-restart（或org-reload）或杀死/重新加载缓冲区。
编辑：这适用于8.3之前的组织模式（到8.2.10为止）
对于版本≥8.3.1，我必须进行修改
- 组织元素所有对象
- 可能是组织元素对象限制
- org-element--set-regexps
- 组织元素-对象词法
并且当然仍然添加功能
- 组织元素我的对象击键解析器
- 组织元素我的对象击键解释器
但
- 组织元素对象继任者
- org-element-text-markup-successor
现在已删除。
感谢Charles C. Berry的帮助。