Added guide for language configuration

docs/guides/changing-the-language.md

@@ -0,0 +1,143 @@
+---
+template: overrides/main.html
+---
+
+# Changing the language
+
+Material for MkDocs supports internationalization (i18n) and provides
+translation keys for all template variables and labels in 40+ languages.
+Additionally, search can be configured to use a language-specific stemmer
+(if available).
+
+## Configuration
+
+### Site language
+
+[:octicons-file-code-24: Source][1] · :octicons-tools-24: Default: `en`
+
+You can set the language from `mkdocs.yml` with:
+
+``` yaml
+theme:
+  language: en
+```
+
+The following languages are supported:
+
+<style>
+  .md-language-list {
+    -webkit-columns: 2;
+       -moz-columns: 2;
+            columns: 2;
+  }
+  .md-language-list li {
+    -webkit-column-break-inside: avoid;
+              page-break-inside: avoid;
+                   break-inside: avoid;
+  }
+</style>
+<ul class="md-language-list">
+  <li><code>af</code> / Afrikaans</li>
+  <li><code>ar</code> / Arabic</li>
+  <li><code>bn</code> / Bengali (Bangla)</li>
+  <li><code>ca</code> / Catalan</li>
+  <li><code>cs</code> / Czech</li>
+  <li><code>da</code> / Danish</li>
+  <li><code>de</code> / German</li>
+  <li><code>en</code> / English</li>
+  <li><code>es</code> / Spanish</li>
+  <li><code>et</code> / Estonian</li>
+  <li><code>fa</code> / Persian (Farsi)</li>
+  <li><code>fi</code> / Finnish</li>
+  <li><code>fr</code> / French</li>
+  <li><code>gl</code> / Galician</li>
+  <li><code>gr</code> / Greek</li>
+  <li><code>he</code> / Hebrew</li>
+  <li><code>hi</code> / Hindi</li>
+  <li><code>hr</code> / Croatian</li>
+  <li><code>hu</code> / Hungarian</li>
+  <li><code>id</code> / Indonesian</li>
+  <li><code>it</code> / Italian</li>
+  <li><code>ja</code> / Japanese</li>
+  <li><code>kr</code> / Korean</li>
+  <li><code>my</code> / Burmese</li>
+  <li><code>nl</code> / Dutch</li>
+  <li><code>nn</code> / Norwegian (Nynorsk)</li>
+  <li><code>no</code> / Norwegian</li>
+  <li><code>pl</code> / Polish</li>
+  <li><code>pt</code> / Portuguese</li>
+  <li><code>ro</code> / Romanian</li>
+  <li><code>ru</code> / Russian</li>
+  <li><code>sh</code> / Serbo-Croatian</li>
+  <li><code>si</code> / Slovenian</li>
+  <li><code>sk</code> / Slovak</li>
+  <li><code>sr</code> / Serbian</li>
+  <li><code>sv</code> / Swedish</li>
+  <li><code>th</code> / Thai</li>
+  <li><code>tr</code> / Turkish</li>
+  <li><code>uk</code> / Ukrainian</li>
+  <li><code>vi</code> / Vietnamese</li>
+  <li><code>zh</code> / Chinese (Simplified)</li>
+  <li><code>zh-Hant</code> / Chinese (Traditional)</li>
+  <li><code>zh-TW</code> / Chinese (Taiwanese)</li>
+  <li>
+    <a href="https://bit.ly/38F5RCa">
+      Add language
+    </a>
+  </li>
+</ul>
+
+  [1]: https://github.com/squidfunk/mkdocs-material/blob/master/src/partials/language/en.html
+
+### Directionality
+
+[:octicons-file-code-24: Source][2] · :octicons-tools-24: Default: best match
+for `theme.language`, automatically set
+
+While many languages are read `ltr` (left-to-right), Material for MkDocs also
+supports `rtl` (right-to-left) directionality which is inferred from the
+selected language, but can also be set with:
+
+``` yaml
+theme:
+  direction: ltr
+```
+
+:material-cursor-default-click-outline: click on a tile to change the
+directionality:
+
+<style>
+  .md-typeset button[data-md-dir] {
+    cursor: pointer;
+    transition: opacity 250ms;
+  }
+  .md-typeset button[data-md-dir]:hover {
+    opacity: 0.75;
+  }
+  .md-typeset button[data-md-dir] > code {
+    display: block;
+    color: var(--md-primary-bg-color);
+    background-color: var(--md-primary-fg-color);
+  }
+</style>
+
+<button data-md-dir="ltr"><code>ltr</code></button>
+<button data-md-dir="rtl"><code>rtl</code></button>
+
+<script>
+  var buttons = document.querySelectorAll("button[data-md-dir]")
+  buttons.forEach(function(button) {
+    var attr = "data-md-dir"
+    button.addEventListener("click", function() {
+      var name = document.querySelector("#__code_1 code span:nth-child(5)")
+      document.body.dir = this.getAttribute(attr)
+      name.textContent = this.getAttribute(attr)
+    })
+  })
+</script>
+
+  [2]: https://github.com/squidfunk/mkdocs-material/blob/master/src/base.html#L180
+
+### Search
+
+TBD