title: How to (properly) output multilingual text in Qt-Embedded?
body: <p>My target system is:</p>
  
  <ul>
  <li>linux 3.3.7,</li>
  <li>Qt Embedded (open source edition) 4.8,</li>
  <li>Droid fonts (taken from fonts-droid_20111207+git-1_all.deb Debian package and copied into <code>/usr/lib/fonts</code> directory),</li>
  <li>Linux Framebuffer for main Qt GUI application,</li>
  <li>everything is build by <a href="http://buildroot.uclibc.org/" rel="nofollow">Buildroot</a> package.</li>
  </ul>
  
  <p>My test application is very simple: just one dialog box with a few static <code>QLabel</code> on it (one for Chinese, one for Arabic, one for Cyrillic, etc).</p>
  
  <p>When I run it on my linux desktop, all labels are shown correctly. But when it runs on my target system some text disappears.</p>
  
  <p>After some research, I'd found this difference in the behavior of Qt framework:
  <code>QFontDatabase</code> class reports that there is only 4 Droid font families on my desktop system:</p>
  
  <pre><code>Droid Sans [unknown]
  Droid Sans [monotype]
  Droid Sans Mono
  Droid Serif
  </code></pre>
  
  <p>But the same <code>QFontDatabase</code> class reports that there are lots of <em>separated</em> font families on my target system:</p>
  
  <pre><code>Droid Arabic Naskh
  Droid Sans
  Droid Sans Armenian
  Droid Sans Ethiopic
  Droid Sans Fallback
  Droid Sans Georgian
  Droid Sans Hebrew
  Droid Sans Japanese
  Droid Sans Mono
  Droid Sans Thai
  Droid Serif
  </code></pre>
  
  <p>As the result, if I change "default" font family for my application (via <code>-fn</code> command line option or manually via calling <code>setFont()</code> inside my application) some text labels are shown but other are not (for example, when I use "Droid Sans Hebrew" font family, Korean text is missing but Hebrew/Arabic are ok).</p>
  
  <p>So, my questions are: what is proper way to output multilingual text in a Qt Embedded application? Why did the "Droid Sans" family become separated? Is there any way to combine them together?</p>
  
  <p>Thanks.</p>