Sync docs: Text/Labels/ENVVARS -> EXTENDING re: fonts

docs/ja_JP.UTF-8/ENVVARS.txt

@@ -125,3 +125,7 @@ may be used by the "Text" and "Label" tools.
     the location of the user's configuration files. It is used to find a
     user-specific "fonts.conf" configuration file.
      
+
+⚙ See the "Extending Tux Paint" documentation for information on where Tux
+Paint searches for fonts.
+

docs/ja_JP.UTF-8/EXTENDING.txt

@@ -620,7 +620,7 @@ option is set). The locations vary, depending on operating system.
       + B_USER_FONTS_DIRECTORY
       + B_USER_NONPACKAGED_FONTS_DIRECTORY
 
-  * Linux
+  * Linux/etc.
       + /usr/share/feh/fonts
       + /usr/share/fonts
       + /usr/X11R6/lib/X11/fonts
@@ -633,7 +633,46 @@ option is set). The locations vary, depending on operating system.
 
                               ### FontConfig ###
 
-...
+Tux Paint utilizes FontConfig to find additional system-wide and user-specific
+fonts that the 'Text' and 'Label' tools might be able to use (unless the
+"--nosysfonts" option is set). It does this by looking for FontConfig
+configuration files ("fonts.conf") in various locations.
+
+  * Windows
+      + The "etc/fonts/fonts.conf" file included with Tux Paint.
+  * macOS
+      + The path specified by the "FONTCONFIG_PATH" environment variable, if
+        set.
+  * Haiku
+      + /boot/system/settings/fonts/fonts.conf
+  * Linux/etc.
+      + The path specified by the "FONTCONFIG_PATH" environment variable, if
+        set.
+      + If the above fails, then "/etc/fonts/fonts.conf".
+      + The path specified by the "XDG_CONFIG_HOME" environment variable, if
+        set. There, it looks for the file "fontconfig/fonts.conf".
+      + If the above fails, then "$HOME/.config/fontconfig/fonts.conf".
+
+Each FontConfig configuration file ("fonts.conf") is examined for "<dir>" tags
+that specify directory (folder) paths where fonts might be found, and Tux Paint
+scans them and loads the fonts. If a "prefix" attribute is included in the tag,
+Tux Paint prefixes the path accordingly.
+
+→ xdg ←
+    The directory path specified is considered to be relative to the user's
+    local data path, specified by the "XDG_DATA_HOME" environment variable. If
+    not set, then ".local/share" under the path specified by the "HOME"
+    environment variable will be used, if it exists.
+     
+→ relative ←
+    The directory path specified is considered to be relative to the
+    configuration file itself.
+     
+→ default, cwd, or no "prefix" attribute specified ←
+    The directory path specified is considered to be relative to the current
+    working directory (where Tux Paint is running), unless a root path is
+    included at the start (e.g., "/", "C:\\", etc.)
+     
 
 'Starters'
 

docs/ja_JP.UTF-8/README.txt

@@ -6,7 +6,7 @@
        Copyright © 2002-2025 by various contributors; AUTHORS.txt 参照.
                              https://tuxpaint.org/
 
-                                 2025年5月26日
+                                 2025年6月 8日
 
 +--------------------------------------------------+
 |                       目次                       |
@@ -436,6 +436,9 @@ e.「もじ」ツール、「ラベル」ツール ←
     するとカーソルが表示され、文字を入力することができます。(入力した文字がキャ
     ンバスに反映される前に、フォント、色、スタイルを変更することができます)
 
+    ⚙ See the "Extending Tux Paint" documentation for information on where Tux
+    Paint searches for fonts.
+
     [Enter]キー、または[Return]キーを押すと文字が描画され、カーソルが次の行に下
     がります。
 

docs/ja_JP.UTF-8/html/ENVVARS.html

@@ -231,6 +231,9 @@
         On Linux and other platforms where the X Desktop Group standards are used, the location of the user's configuration files. It is used to find a user-specific "<code>fonts.conf</code>" configuration file.      </dd>
     </dl>
 
+    <p class="note">
+      <span title="Configuration option">&#9881;</span>      See the "<a href="EXTENDING.html"><em>Extending Tux Paint</em></a>" documentation for information on where Tux Paint searches for fonts.    </p>
+
   </body>
 </html>
 

docs/ja_JP.UTF-8/html/README.html

@@ -102,7 +102,7 @@
           </p>
 
           <p>
-            2025年5月26日          </p>
+            2025年6月 8日          </p>
         </center>
       </header>
       <table border="2"
@@ -813,6 +813,9 @@
   <p>
     まず、右側のセレクタからフォントを、下部のパレットから色を選択します。さらに、テキストに太字や斜体のスタイルを適用することもできます。画面をクリックするとカーソルが表示され、文字を入力することができます。(入力した文字がキャンバスに反映される前に、フォント、色、スタイルを変更することができます)  </p>
 
+  <p class="note">
+    <span title="Configuration option">&#9881;</span>    See the "<a href="EXTENDING.html"><em>Extending Tux Paint</em></a>" documentation for information on where Tux Paint searches for fonts.  </p>
+
   <p>
     <b><code>[Enter]</code></b>キー、または<b><code>[Return]</code></b>キーを押すと文字が描画され、カーソルが次の行に下がります。  </p>