Hi Byung-Hee,

org-mode itself uses emacs lisp as the programming language for development and extension and you may need to use a little lisp to access some of the features.

However, if you are interested in learning Python and/or Ruby I highly recommend you look at the org-babel features: http://orgmode.org/worg/org-contrib/babel/ .
This allows you to mix up code blocks with your notes and links for an interactive "notebook" similar to Jupyter. (If you haven't tried Jupyter, you really should look at that too!)
These blocks will appear as formatted code blocks in your output HTML or LaTeX. I use it as a lab notebook.

All the best,
Adam


Message: 2
Date: Sun, 16 Jul 2017 21:19:23 +0900
From: "Byung-Hee HWANG (???,     =?utf-8?B?6buD54Kz54aZKQ==?="
    <soyeomul@doraji.xyz>
To: emacs-orgmode@gnu.org
Subject: [O] Ruby or Python or Something
Message-ID: <yw.87lgno8th0.fsf@alex.chromebook>
Content-Type: text/plain; charset=utf-8

Somewaht it is foolish question. Suddenly i get interested in other
languages such as Ruby, Python, ... By the way these computing languages
help to understand of org mode?

My position is a writer, not programmer. To make HTML/LaTeX documents
with Emacs is my goal. Any comments welcome!!!

--
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