From df5862d950eb9c63f50363220bf38bfc24d530c9 Mon Sep 17 00:00:00 2001
From: Marius Peter <marius.peter@tutanota.com>
Date: Sat, 26 Mar 2022 19:02:15 +0100
Subject: Wiki articles.

---
 wiki/languages/Russian.org              |  58 -----
 wiki/languages/arabic/abjad.org         |  52 +++++
 wiki/languages/index.org                |   6 +
 wiki/languages/russian/notes.html       | 388 ++++++++++++++++++++++++++++++++
 wiki/languages/russian/notes.org        |  60 +++++
 wiki/languages/why-study-languages.html | 238 ++++++++++++++++++++
 6 files changed, 744 insertions(+), 58 deletions(-)
 delete mode 100644 wiki/languages/Russian.org
 create mode 100644 wiki/languages/arabic/abjad.org
 create mode 100644 wiki/languages/index.org
 create mode 100644 wiki/languages/russian/notes.html
 create mode 100644 wiki/languages/russian/notes.org
 create mode 100644 wiki/languages/why-study-languages.html

(limited to 'wiki/languages')

diff --git a/wiki/languages/Russian.org b/wiki/languages/Russian.org
deleted file mode 100644
index cad1514..0000000
--- a/wiki/languages/Russian.org
+++ /dev/null
@@ -1,58 +0,0 @@
-# -*- mode: org; -*-
-
-#+TITLE: Заметки о русском языке
-#+SUBTITLE: Notes about the Russian language
-#+AUTHOR: Marius Peter
-#+DATE: <2021-08-30 Mon>
-#+DESCRIPTION: Russian language notes
-#+KEYWORDS: languages Russian wiki notes
-#+OPTIONS: toc:nil
-
-
-# +SETUPFILE: ~/.emacs.d/resources/templates/documents/gnu-default.setup
-# +INCLUDE: ~/.emacs.d/resources/templates/documents/title-short.org
-
-# Cyrillic font support lets go 🔥
-#+LATEX_HEADER: \setmainfont{linux libertine}
-
-#+LATEX: \tableofcontents
-#+LATEX: \listoffigures
-#+LATEX: \listoftables\clearpage
-
-#+TOC: headlines 2
-
-
-* Conjugaison
-
-* Declinations
-
-** Genitive
-
-#+CAPTION: Genitive---singular masculine nouns.
-#+ATTR_LATEX: :booktabs t
-|                       |      <c>      |             |
-| Ending or Description | How to Change | Examples    |
-|-----------------------+---------------+-------------|
-| a consonant           |      +а       | дом - до́мa  |
-| й                     |    -й / +я    | край – кра́я |
-| ь                     |    -ь / +я    | конь – коня́ |
-|-----------------------+---------------+-------------|
-
-#+CAPTION: Genitive---singular feminine nouns.
-#+ATTR_LATEX: :booktabs t
-|                             |      <c>      |                          |
-| Ending or Description       | How to Change | Examples                 |
-|-----------------------------+---------------+--------------------------|
-| а                           |    -а / +ы    | луна́ – луны́              |
-| ка,га,  ха,  жа, ша, ща, ча |    -а / +и    | рука́ – руки́, ко́жа – ко́жи |
-| я                           |    -я / +и    | ста́нция – ста́нции        |
-| ь                           |    -ь / +и    | дверь – две́ри            |
-
-#+CAPTION: Genitive---singular neutral nouns.
-#+ATTR_LATEX: :booktabs t
-|                       |      <c>      |                   |
-| Ending or Description | How to Change | Examples          |
-|-----------------------+---------------+-------------------|
-| о                     |    -о / +а    | лицо́ – лица́       |
-| е                     |    -е / +я    | варе́нье – варе́нья |
-| це,же,ше,   ще        |    -е / +а    |                   |
diff --git a/wiki/languages/arabic/abjad.org b/wiki/languages/arabic/abjad.org
new file mode 100644
index 0000000..6453c69
--- /dev/null
+++ b/wiki/languages/arabic/abjad.org
@@ -0,0 +1,52 @@
+# -*- mode: org; -*-
+
+#+TITLE:  الْعَرَبِيَّة
+#+SUBTITLE: Al-abjadīyah l-ʿarabīyah---the arabic abjad.
+#+AUTHOR: Marius Peter
+#+DATE: <2022-03-12 Sat>
+#+OPTIONS: toc:nil
+
+#+DESCRIPTION: The arabic abjad.
+
+#+HTML_HEAD_EXTRA: <style> :root { --topnav: #009000; } </style>
+#+HTML_HEAD_EXTRA: <style> .title, h2, h3, h4, * { font-family: "Amiri"; } </style>
+
+
+* Abjad
+
+#+begin_verse
+The arabic abjad contains 28 letters.
+يحتوي أبجد العربي على 28 حرفًا.
+Yahtawi 'abjad alearabii ealaa 28 hrfan.
+#+end_verse
+
+| Abjad numeral | Pronunciation | Letter |
+|---------------+---------------+--------|
+|            01 | ʾ             | أ      |
+|            02 | b             | ب      |
+|            03 | j             | ج      |
+|            04 | d             | د      |
+|            05 | h             | ه      |
+|            06 | w             | و      |
+|            07 | z             | ز      |
+|            08 | ḥ             | ح      |
+|            09 | ṭ             | ط      |
+|            10 | y             | ي      |
+|            20 | k             | ك      |
+|            30 | l             | ل      |
+|            40 | m             | م      |
+|            50 | n             | ن      |
+|            60 | s             | س      |
+|            70 | ʿ             | ع      |
+|            80 | f             | ف      |
+|            90 | ṣ             | ص      |
+|           100 | q             | ق      |
+|           200 | r             | ر      |
+|           300 | sh            | ش      |
+|           400 | t             | ت      |
+|           500 | th            | ث      |
+|           600 | kh            | خ      |
+|           700 | dh            | ذ      |
+|           800 | ḍ             | ض      |
+|           900 | ẓ             | ظ      |
+|            1k | gh            |        |
diff --git a/wiki/languages/index.org b/wiki/languages/index.org
new file mode 100644
index 0000000..e8b9079
--- /dev/null
+++ b/wiki/languages/index.org
@@ -0,0 +1,6 @@
+#+TITLE: Sitemap for project wiki---languages
+
+- arabic
+  - [[file:arabic/abjad.org][الْعَرَبِيَّة]]
+- russian
+  - [[file:russian/notes.org][Заметки о русском языке]]
\ No newline at end of file
diff --git a/wiki/languages/russian/notes.html b/wiki/languages/russian/notes.html
new file mode 100644
index 0000000..f6ebcdc
--- /dev/null
+++ b/wiki/languages/russian/notes.html
@@ -0,0 +1,388 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
+<head>
+<!-- 2022-03-12 Sat 14:44 -->
+<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
+<meta name="viewport" content="width=device-width, initial-scale=1" />
+<title>Заметки о русском языке</title>
+<meta name="generator" content="Org mode" />
+<meta name="author" content="Marius Peter" />
+<meta name="description" content="Russian language notes"
+ />
+<meta name="keywords" content="languages Russian wiki notes" />
+<style type="text/css">
+ <!--/*--><![CDATA[/*><!--*/
+  .title  { text-align: center;
+             margin-bottom: .2em; }
+  .subtitle { text-align: center;
+              font-size: medium;
+              font-weight: bold;
+              margin-top:0; }
+  .todo   { font-family: monospace; color: red; }
+  .done   { font-family: monospace; color: green; }
+  .priority { font-family: monospace; color: orange; }
+  .tag    { background-color: #eee; font-family: monospace;
+            padding: 2px; font-size: 80%; font-weight: normal; }
+  .timestamp { color: #bebebe; }
+  .timestamp-kwd { color: #5f9ea0; }
+  .org-right  { margin-left: auto; margin-right: 0px;  text-align: right; }
+  .org-left   { margin-left: 0px;  margin-right: auto; text-align: left; }
+  .org-center { margin-left: auto; margin-right: auto; text-align: center; }
+  .underline { text-decoration: underline; }
+  #postamble p, #preamble p { font-size: 90%; margin: .2em; }
+  p.verse { margin-left: 3%; }
+  pre {
+    border: 1px solid #ccc;
+    box-shadow: 3px 3px 3px #eee;
+    padding: 8pt;
+    font-family: monospace;
+    overflow: auto;
+    margin: 1.2em;
+  }
+  pre.src {
+    position: relative;
+    overflow: auto;
+    padding-top: 1.2em;
+  }
+  pre.src:before {
+    display: none;
+    position: absolute;
+    background-color: white;
+    top: -10px;
+    right: 10px;
+    padding: 3px;
+    border: 1px solid black;
+  }
+  pre.src:hover:before { display: inline; margin-top: 14px;}
+  /* Languages per Org manual */
+  pre.src-asymptote:before { content: 'Asymptote'; }
+  pre.src-awk:before { content: 'Awk'; }
+  pre.src-C:before { content: 'C'; }
+  /* pre.src-C++ doesn't work in CSS */
+  pre.src-clojure:before { content: 'Clojure'; }
+  pre.src-css:before { content: 'CSS'; }
+  pre.src-D:before { content: 'D'; }
+  pre.src-ditaa:before { content: 'ditaa'; }
+  pre.src-dot:before { content: 'Graphviz'; }
+  pre.src-calc:before { content: 'Emacs Calc'; }
+  pre.src-emacs-lisp:before { content: 'Emacs Lisp'; }
+  pre.src-fortran:before { content: 'Fortran'; }
+  pre.src-gnuplot:before { content: 'gnuplot'; }
+  pre.src-haskell:before { content: 'Haskell'; }
+  pre.src-hledger:before { content: 'hledger'; }
+  pre.src-java:before { content: 'Java'; }
+  pre.src-js:before { content: 'Javascript'; }
+  pre.src-latex:before { content: 'LaTeX'; }
+  pre.src-ledger:before { content: 'Ledger'; }
+  pre.src-lisp:before { content: 'Lisp'; }
+  pre.src-lilypond:before { content: 'Lilypond'; }
+  pre.src-lua:before { content: 'Lua'; }
+  pre.src-matlab:before { content: 'MATLAB'; }
+  pre.src-mscgen:before { content: 'Mscgen'; }
+  pre.src-ocaml:before { content: 'Objective Caml'; }
+  pre.src-octave:before { content: 'Octave'; }
+  pre.src-org:before { content: 'Org mode'; }
+  pre.src-oz:before { content: 'OZ'; }
+  pre.src-plantuml:before { content: 'Plantuml'; }
+  pre.src-processing:before { content: 'Processing.js'; }
+  pre.src-python:before { content: 'Python'; }
+  pre.src-R:before { content: 'R'; }
+  pre.src-ruby:before { content: 'Ruby'; }
+  pre.src-sass:before { content: 'Sass'; }
+  pre.src-scheme:before { content: 'Scheme'; }
+  pre.src-screen:before { content: 'Gnu Screen'; }
+  pre.src-sed:before { content: 'Sed'; }
+  pre.src-sh:before { content: 'shell'; }
+  pre.src-sql:before { content: 'SQL'; }
+  pre.src-sqlite:before { content: 'SQLite'; }
+  /* additional languages in org.el's org-babel-load-languages alist */
+  pre.src-forth:before { content: 'Forth'; }
+  pre.src-io:before { content: 'IO'; }
+  pre.src-J:before { content: 'J'; }
+  pre.src-makefile:before { content: 'Makefile'; }
+  pre.src-maxima:before { content: 'Maxima'; }
+  pre.src-perl:before { content: 'Perl'; }
+  pre.src-picolisp:before { content: 'Pico Lisp'; }
+  pre.src-scala:before { content: 'Scala'; }
+  pre.src-shell:before { content: 'Shell Script'; }
+  pre.src-ebnf2ps:before { content: 'ebfn2ps'; }
+  /* additional language identifiers per "defun org-babel-execute"
+       in ob-*.el */
+  pre.src-cpp:before  { content: 'C++'; }
+  pre.src-abc:before  { content: 'ABC'; }
+  pre.src-coq:before  { content: 'Coq'; }
+  pre.src-groovy:before  { content: 'Groovy'; }
+  /* additional language identifiers from org-babel-shell-names in
+     ob-shell.el: ob-shell is the only babel language using a lambda to put
+     the execution function name together. */
+  pre.src-bash:before  { content: 'bash'; }
+  pre.src-csh:before  { content: 'csh'; }
+  pre.src-ash:before  { content: 'ash'; }
+  pre.src-dash:before  { content: 'dash'; }
+  pre.src-ksh:before  { content: 'ksh'; }
+  pre.src-mksh:before  { content: 'mksh'; }
+  pre.src-posh:before  { content: 'posh'; }
+  /* Additional Emacs modes also supported by the LaTeX listings package */
+  pre.src-ada:before { content: 'Ada'; }
+  pre.src-asm:before { content: 'Assembler'; }
+  pre.src-caml:before { content: 'Caml'; }
+  pre.src-delphi:before { content: 'Delphi'; }
+  pre.src-html:before { content: 'HTML'; }
+  pre.src-idl:before { content: 'IDL'; }
+  pre.src-mercury:before { content: 'Mercury'; }
+  pre.src-metapost:before { content: 'MetaPost'; }
+  pre.src-modula-2:before { content: 'Modula-2'; }
+  pre.src-pascal:before { content: 'Pascal'; }
+  pre.src-ps:before { content: 'PostScript'; }
+  pre.src-prolog:before { content: 'Prolog'; }
+  pre.src-simula:before { content: 'Simula'; }
+  pre.src-tcl:before { content: 'tcl'; }
+  pre.src-tex:before { content: 'TeX'; }
+  pre.src-plain-tex:before { content: 'Plain TeX'; }
+  pre.src-verilog:before { content: 'Verilog'; }
+  pre.src-vhdl:before { content: 'VHDL'; }
+  pre.src-xml:before { content: 'XML'; }
+  pre.src-nxml:before { content: 'XML'; }
+  /* add a generic configuration mode; LaTeX export needs an additional
+     (add-to-list 'org-latex-listings-langs '(conf " ")) in .emacs */
+  pre.src-conf:before { content: 'Configuration File'; }
+
+  table { border-collapse:collapse; }
+  caption.t-above { caption-side: top; }
+  caption.t-bottom { caption-side: bottom; }
+  td, th { vertical-align:top;  }
+  th.org-right  { text-align: center;  }
+  th.org-left   { text-align: center;   }
+  th.org-center { text-align: center; }
+  td.org-right  { text-align: right;  }
+  td.org-left   { text-align: left;   }
+  td.org-center { text-align: center; }
+  dt { font-weight: bold; }
+  .footpara { display: inline; }
+  .footdef  { margin-bottom: 1em; }
+  .figure { padding: 1em; }
+  .figure p { text-align: center; }
+  .equation-container {
+    display: table;
+    text-align: center;
+    width: 100%;
+  }
+  .equation {
+    vertical-align: middle;
+  }
+  .equation-label {
+    display: table-cell;
+    text-align: right;
+    vertical-align: middle;
+  }
+  .inlinetask {
+    padding: 10px;
+    border: 2px solid gray;
+    margin: 10px;
+    background: #ffffcc;
+  }
+  #org-div-home-and-up
+   { text-align: right; font-size: 70%; white-space: nowrap; }
+  textarea { overflow-x: auto; }
+  .linenr { font-size: smaller }
+  .code-highlighted { background-color: #ffff00; }
+  .org-info-js_info-navigation { border-style: none; }
+  #org-info-js_console-label
+    { font-size: 10px; font-weight: bold; white-space: nowrap; }
+  .org-info-js_search-highlight
+    { background-color: #ffff00; color: #000000; font-weight: bold; }
+  .org-svg { width: 90%; }
+  /*]]>*/-->
+</style>
+<script type="text/javascript">
+// @license magnet:?xt=urn:btih:e95b018ef3580986a04669f1b5879592219e2a7a&dn=public-domain.txt Public Domain
+<!--/*--><![CDATA[/*><!--*/
+     function CodeHighlightOn(elem, id)
+     {
+       var target = document.getElementById(id);
+       if(null != target) {
+         elem.classList.add("code-highlighted");
+         target.classList.add("code-highlighted");
+       }
+     }
+     function CodeHighlightOff(elem, id)
+     {
+       var target = document.getElementById(id);
+       if(null != target) {
+         elem.classList.remove("code-highlighted");
+         target.classList.remove("code-highlighted");
+       }
+     }
+    /*]]>*///-->
+// @license-end
+</script>
+</head>
+<body>
+<div id="org-div-home-and-up">
+ <a accesskey="h" href="../index.html"> UP </a>
+ |
+ <a accesskey="H" href="../../index.html"> HOME </a>
+</div><div id="content">
+<h1 class="title">Заметки о русском языке
+<br />
+<span class="subtitle">Notes about the Russian language</span>
+</h1>
+<div id="table-of-contents">
+<h2>Table of Contents</h2>
+<div id="text-table-of-contents">
+<ul>
+<li><a href="#org488a19f">1. Conjugaison</a></li>
+<li><a href="#org0c2de49">2. Declinations</a>
+<ul>
+<li><a href="#orgabcef76">2.1. Genitive</a></li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+
+<div id="outline-container-org488a19f" class="outline-2">
+<h2 id="org488a19f"><span class="section-number-2">1</span> Conjugaison</h2>
+</div>
+
+<div id="outline-container-org0c2de49" class="outline-2">
+<h2 id="org0c2de49"><span class="section-number-2">2</span> Declinations</h2>
+<div class="outline-text-2" id="text-2">
+</div>
+<div id="outline-container-orgabcef76" class="outline-3">
+<h3 id="orgabcef76"><span class="section-number-3">2.1</span> Genitive</h3>
+<div class="outline-text-3" id="text-2-1">
+<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
+<caption class="t-above"><span class="table-number">Table 1:</span> Genitive&#x2014;singular masculine nouns.</caption>
+
+<colgroup>
+<col  class="org-left" />
+
+<col  class="org-center" />
+
+<col  class="org-left" />
+</colgroup>
+<thead>
+<tr>
+<th scope="col" class="org-left">Ending or Description</th>
+<th scope="col" class="org-center">How to Change</th>
+<th scope="col" class="org-left">Examples</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="org-left">a consonant</td>
+<td class="org-center">+а</td>
+<td class="org-left">дом - до́мa</td>
+</tr>
+
+<tr>
+<td class="org-left">й</td>
+<td class="org-center">-й / +я</td>
+<td class="org-left">край – кра́я</td>
+</tr>
+
+<tr>
+<td class="org-left">ь</td>
+<td class="org-center">-ь / +я</td>
+<td class="org-left">конь – коня́</td>
+</tr>
+</tbody>
+</table>
+
+<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
+<caption class="t-above"><span class="table-number">Table 2:</span> Genitive&#x2014;singular feminine nouns.</caption>
+
+<colgroup>
+<col  class="org-left" />
+
+<col  class="org-center" />
+
+<col  class="org-left" />
+</colgroup>
+<thead>
+<tr>
+<th scope="col" class="org-left">Ending or Description</th>
+<th scope="col" class="org-center">How to Change</th>
+<th scope="col" class="org-left">Examples</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="org-left">а</td>
+<td class="org-center">-а / +ы</td>
+<td class="org-left">луна́ – луны́</td>
+</tr>
+
+<tr>
+<td class="org-left">ка,га,  ха,  жа, ша, ща, ча</td>
+<td class="org-center">-а / +и</td>
+<td class="org-left">рука́ – руки́, ко́жа – ко́жи</td>
+</tr>
+
+<tr>
+<td class="org-left">я</td>
+<td class="org-center">-я / +и</td>
+<td class="org-left">ста́нция – ста́нции</td>
+</tr>
+
+<tr>
+<td class="org-left">ь</td>
+<td class="org-center">-ь / +и</td>
+<td class="org-left">дверь – две́ри</td>
+</tr>
+</tbody>
+</table>
+
+<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
+<caption class="t-above"><span class="table-number">Table 3:</span> Genitive&#x2014;singular neutral nouns.</caption>
+
+<colgroup>
+<col  class="org-left" />
+
+<col  class="org-center" />
+
+<col  class="org-left" />
+</colgroup>
+<thead>
+<tr>
+<th scope="col" class="org-left">Ending or Description</th>
+<th scope="col" class="org-center">How to Change</th>
+<th scope="col" class="org-left">Examples</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="org-left">о</td>
+<td class="org-center">-о / +а</td>
+<td class="org-left">лицо́ – лица́</td>
+</tr>
+
+<tr>
+<td class="org-left">е</td>
+<td class="org-center">-е / +я</td>
+<td class="org-left">варе́нье – варе́нья</td>
+</tr>
+
+<tr>
+<td class="org-left">це,же,ше,   ще</td>
+<td class="org-center">-е / +а</td>
+<td class="org-left">&#xa0;</td>
+</tr>
+</tbody>
+</table>
+</div>
+</div>
+</div>
+</div>
+<div id="postamble" class="status">
+<p class="date">Date: 2021-08-30 Mon 00:00</p>
+<p class="author">Author: Marius Peter</p>
+<p class="date">Created: 2022-03-12 Sat 14:44</p>
+<p class="validation"><a href="https://validator.w3.org/check?uri=referer">Validate</a></p>
+</div>
+</body>
+</html>
diff --git a/wiki/languages/russian/notes.org b/wiki/languages/russian/notes.org
new file mode 100644
index 0000000..3aa43b2
--- /dev/null
+++ b/wiki/languages/russian/notes.org
@@ -0,0 +1,60 @@
+# -*- mode: org; -*-
+
+#+TITLE: Заметки о русском языке
+#+SUBTITLE: Notes about the Russian language
+#+AUTHOR: Marius Peter
+#+DATE: <2021-08-30 Mon>
+#+OPTIONS: toc:nil
+
+#+DESCRIPTION: Notes about the Russian language.
+#+KEYWORDS: languages Russian wiki notes
+#+HTML_LINK_UP: ../index.html
+#+HTML_LINK_HOME: ../../index.html
+
+# +SETUPFILE: ~/.emacs.d/resources/templates/documents/gnu-default.setup
+# +INCLUDE: ~/.emacs.d/resources/templates/documents/title-short.org
+
+# Cyrillic font support lets go 🔥
+#+LATEX_HEADER: \setmainfont{linux libertine}
+
+#+LATEX: \tableofcontents
+#+LATEX: \listoffigures
+#+LATEX: \listoftables\clearpage
+
+#+TOC: headlines 2
+
+
+* Conjugaison
+
+* Declinations
+
+** Genitive
+
+#+CAPTION: Genitive---singular masculine nouns.
+#+ATTR_LATEX: :booktabs t
+|                       |      <c>      |             |
+| Ending or Description | How to Change | Examples    |
+|-----------------------+---------------+-------------|
+| a consonant           |      +а       | дом - до́мa  |
+| й                     |    -й / +я    | край – кра́я |
+| ь                     |    -ь / +я    | конь – коня́ |
+|-----------------------+---------------+-------------|
+
+#+CAPTION: Genitive---singular feminine nouns.
+#+ATTR_LATEX: :booktabs t
+|                             |      <c>      |                          |
+| Ending or Description       | How to Change | Examples                 |
+|-----------------------------+---------------+--------------------------|
+| а                           |    -а / +ы    | луна́ – луны́              |
+| ка,га,  ха,  жа, ша, ща, ча |    -а / +и    | рука́ – руки́, ко́жа – ко́жи |
+| я                           |    -я / +и    | ста́нция – ста́нции        |
+| ь                           |    -ь / +и    | дверь – две́ри            |
+
+#+CAPTION: Genitive---singular neutral nouns.
+#+ATTR_LATEX: :booktabs t
+|                       |      <c>      |                   |
+| Ending or Description | How to Change | Examples          |
+|-----------------------+---------------+-------------------|
+| о                     |    -о / +а    | лицо́ – лица́       |
+| е                     |    -е / +я    | варе́нье – варе́нья |
+| це,же,ше,   ще        |    -е / +а    |                   |
diff --git a/wiki/languages/why-study-languages.html b/wiki/languages/why-study-languages.html
new file mode 100644
index 0000000..b395c5c
--- /dev/null
+++ b/wiki/languages/why-study-languages.html
@@ -0,0 +1,238 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
+<head>
+<!-- 2022-03-12 Sat 14:34 -->
+<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
+<meta name="viewport" content="width=device-width, initial-scale=1" />
+<title>Why study languages?</title>
+<meta name="generator" content="Org mode" />
+<meta name="author" content="Marius Peter" />
+<meta name="description" content="Notes taken for all studied languages."
+ />
+<style type="text/css">
+ <!--/*--><![CDATA[/*><!--*/
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+              font-weight: bold;
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+  .done   { font-family: monospace; color: green; }
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+  .timestamp { color: #bebebe; }
+  .timestamp-kwd { color: #5f9ea0; }
+  .org-right  { margin-left: auto; margin-right: 0px;  text-align: right; }
+  .org-left   { margin-left: 0px;  margin-right: auto; text-align: left; }
+  .org-center { margin-left: auto; margin-right: auto; text-align: center; }
+  .underline { text-decoration: underline; }
+  #postamble p, #preamble p { font-size: 90%; margin: .2em; }
+  p.verse { margin-left: 3%; }
+  pre {
+    border: 1px solid #ccc;
+    box-shadow: 3px 3px 3px #eee;
+    padding: 8pt;
+    font-family: monospace;
+    overflow: auto;
+    margin: 1.2em;
+  }
+  pre.src {
+    position: relative;
+    overflow: auto;
+    padding-top: 1.2em;
+  }
+  pre.src:before {
+    display: none;
+    position: absolute;
+    background-color: white;
+    top: -10px;
+    right: 10px;
+    padding: 3px;
+    border: 1px solid black;
+  }
+  pre.src:hover:before { display: inline; margin-top: 14px;}
+  /* Languages per Org manual */
+  pre.src-asymptote:before { content: 'Asymptote'; }
+  pre.src-awk:before { content: 'Awk'; }
+  pre.src-C:before { content: 'C'; }
+  /* pre.src-C++ doesn't work in CSS */
+  pre.src-clojure:before { content: 'Clojure'; }
+  pre.src-css:before { content: 'CSS'; }
+  pre.src-D:before { content: 'D'; }
+  pre.src-ditaa:before { content: 'ditaa'; }
+  pre.src-dot:before { content: 'Graphviz'; }
+  pre.src-calc:before { content: 'Emacs Calc'; }
+  pre.src-emacs-lisp:before { content: 'Emacs Lisp'; }
+  pre.src-fortran:before { content: 'Fortran'; }
+  pre.src-gnuplot:before { content: 'gnuplot'; }
+  pre.src-haskell:before { content: 'Haskell'; }
+  pre.src-hledger:before { content: 'hledger'; }
+  pre.src-java:before { content: 'Java'; }
+  pre.src-js:before { content: 'Javascript'; }
+  pre.src-latex:before { content: 'LaTeX'; }
+  pre.src-ledger:before { content: 'Ledger'; }
+  pre.src-lisp:before { content: 'Lisp'; }
+  pre.src-lilypond:before { content: 'Lilypond'; }
+  pre.src-lua:before { content: 'Lua'; }
+  pre.src-matlab:before { content: 'MATLAB'; }
+  pre.src-mscgen:before { content: 'Mscgen'; }
+  pre.src-ocaml:before { content: 'Objective Caml'; }
+  pre.src-octave:before { content: 'Octave'; }
+  pre.src-org:before { content: 'Org mode'; }
+  pre.src-oz:before { content: 'OZ'; }
+  pre.src-plantuml:before { content: 'Plantuml'; }
+  pre.src-processing:before { content: 'Processing.js'; }
+  pre.src-python:before { content: 'Python'; }
+  pre.src-R:before { content: 'R'; }
+  pre.src-ruby:before { content: 'Ruby'; }
+  pre.src-sass:before { content: 'Sass'; }
+  pre.src-scheme:before { content: 'Scheme'; }
+  pre.src-screen:before { content: 'Gnu Screen'; }
+  pre.src-sed:before { content: 'Sed'; }
+  pre.src-sh:before { content: 'shell'; }
+  pre.src-sql:before { content: 'SQL'; }
+  pre.src-sqlite:before { content: 'SQLite'; }
+  /* additional languages in org.el's org-babel-load-languages alist */
+  pre.src-forth:before { content: 'Forth'; }
+  pre.src-io:before { content: 'IO'; }
+  pre.src-J:before { content: 'J'; }
+  pre.src-makefile:before { content: 'Makefile'; }
+  pre.src-maxima:before { content: 'Maxima'; }
+  pre.src-perl:before { content: 'Perl'; }
+  pre.src-picolisp:before { content: 'Pico Lisp'; }
+  pre.src-scala:before { content: 'Scala'; }
+  pre.src-shell:before { content: 'Shell Script'; }
+  pre.src-ebnf2ps:before { content: 'ebfn2ps'; }
+  /* additional language identifiers per "defun org-babel-execute"
+       in ob-*.el */
+  pre.src-cpp:before  { content: 'C++'; }
+  pre.src-abc:before  { content: 'ABC'; }
+  pre.src-coq:before  { content: 'Coq'; }
+  pre.src-groovy:before  { content: 'Groovy'; }
+  /* additional language identifiers from org-babel-shell-names in
+     ob-shell.el: ob-shell is the only babel language using a lambda to put
+     the execution function name together. */
+  pre.src-bash:before  { content: 'bash'; }
+  pre.src-csh:before  { content: 'csh'; }
+  pre.src-ash:before  { content: 'ash'; }
+  pre.src-dash:before  { content: 'dash'; }
+  pre.src-ksh:before  { content: 'ksh'; }
+  pre.src-mksh:before  { content: 'mksh'; }
+  pre.src-posh:before  { content: 'posh'; }
+  /* Additional Emacs modes also supported by the LaTeX listings package */
+  pre.src-ada:before { content: 'Ada'; }
+  pre.src-asm:before { content: 'Assembler'; }
+  pre.src-caml:before { content: 'Caml'; }
+  pre.src-delphi:before { content: 'Delphi'; }
+  pre.src-html:before { content: 'HTML'; }
+  pre.src-idl:before { content: 'IDL'; }
+  pre.src-mercury:before { content: 'Mercury'; }
+  pre.src-metapost:before { content: 'MetaPost'; }
+  pre.src-modula-2:before { content: 'Modula-2'; }
+  pre.src-pascal:before { content: 'Pascal'; }
+  pre.src-ps:before { content: 'PostScript'; }
+  pre.src-prolog:before { content: 'Prolog'; }
+  pre.src-simula:before { content: 'Simula'; }
+  pre.src-tcl:before { content: 'tcl'; }
+  pre.src-tex:before { content: 'TeX'; }
+  pre.src-plain-tex:before { content: 'Plain TeX'; }
+  pre.src-verilog:before { content: 'Verilog'; }
+  pre.src-vhdl:before { content: 'VHDL'; }
+  pre.src-xml:before { content: 'XML'; }
+  pre.src-nxml:before { content: 'XML'; }
+  /* add a generic configuration mode; LaTeX export needs an additional
+     (add-to-list 'org-latex-listings-langs '(conf " ")) in .emacs */
+  pre.src-conf:before { content: 'Configuration File'; }
+
+  table { border-collapse:collapse; }
+  caption.t-above { caption-side: top; }
+  caption.t-bottom { caption-side: bottom; }
+  td, th { vertical-align:top;  }
+  th.org-right  { text-align: center;  }
+  th.org-left   { text-align: center;   }
+  th.org-center { text-align: center; }
+  td.org-right  { text-align: right;  }
+  td.org-left   { text-align: left;   }
+  td.org-center { text-align: center; }
+  dt { font-weight: bold; }
+  .footpara { display: inline; }
+  .footdef  { margin-bottom: 1em; }
+  .figure { padding: 1em; }
+  .figure p { text-align: center; }
+  .equation-container {
+    display: table;
+    text-align: center;
+    width: 100%;
+  }
+  .equation {
+    vertical-align: middle;
+  }
+  .equation-label {
+    display: table-cell;
+    text-align: right;
+    vertical-align: middle;
+  }
+  .inlinetask {
+    padding: 10px;
+    border: 2px solid gray;
+    margin: 10px;
+    background: #ffffcc;
+  }
+  #org-div-home-and-up
+   { text-align: right; font-size: 70%; white-space: nowrap; }
+  textarea { overflow-x: auto; }
+  .linenr { font-size: smaller }
+  .code-highlighted { background-color: #ffff00; }
+  .org-info-js_info-navigation { border-style: none; }
+  #org-info-js_console-label
+    { font-size: 10px; font-weight: bold; white-space: nowrap; }
+  .org-info-js_search-highlight
+    { background-color: #ffff00; color: #000000; font-weight: bold; }
+  .org-svg { width: 90%; }
+  /*]]>*/-->
+</style>
+<script type="text/javascript">
+// @license magnet:?xt=urn:btih:e95b018ef3580986a04669f1b5879592219e2a7a&dn=public-domain.txt Public Domain
+<!--/*--><![CDATA[/*><!--*/
+     function CodeHighlightOn(elem, id)
+     {
+       var target = document.getElementById(id);
+       if(null != target) {
+         elem.classList.add("code-highlighted");
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+       }
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+     function CodeHighlightOff(elem, id)
+     {
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+       if(null != target) {
+         elem.classList.remove("code-highlighted");
+         target.classList.remove("code-highlighted");
+       }
+     }
+    /*]]>*///-->
+// @license-end
+</script>
+</head>
+<body>
+<div id="content">
+<h1 class="title">Why study languages?
+<br />
+<span class="subtitle">Because understanding others is understanding ourselves.</span>
+</h1>
+<p>
+Main languages of interest include Russian and Arabic.
+</p>
+</div>
+<div id="postamble" class="status">
+<p class="date">Date: 2022-03-12 Sat 00:00</p>
+<p class="author">Author: Marius Peter</p>
+<p class="date">Created: 2022-03-12 Sat 14:34</p>
+<p class="validation"><a href="https://validator.w3.org/check?uri=referer">Validate</a></p>
+</div>
+</body>
+</html>
-- 
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