<p>"...translation in other languages? Where are its synonyms?"</p>

<p>There are three bad news for you.</p>

<ol>
<li><p>All this information (translations, synonyms) are a plain text of the Wiktionary article. </p></li>
<li><p>Different Wiktionaries have different structure of the dictionary article. For example, compare the structure of the article in the <a href="https://en.wiktionary.org/wiki/Wiktionary:ELE" rel="nofollow">English Wiktioinary</a> and in the <a href="https://ru.wiktionary.org/wiki/%D0%92%D0%B8%D0%BA%D0%B8%D1%81%D0%BB%D0%BE%D0%B2%D0%B0%D1%80%D1%8C:%D0%9F%D1%80%D0%B0%D0%B2%D0%B8%D0%BB%D0%B0_%D0%BE%D1%84%D0%BE%D1%80%D0%BC%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F_%D1%81%D1%82%D0%B0%D1%82%D0%B5%D0%B9" rel="nofollow">Russian Wiktionary</a>.</p></li>
<li><p>The structure of Wiktionary article is not presented in the XML-file, it is just a simple plain text, see item 1. Thus you need to parse this text in order to extract synonyms or translation.</p></li>
</ol>

<p>You are welcome to read my paper about transforming (parsing) texts of Wiktionary articles to machine-readable database: <a href="http://arxiv.org/abs/1011.1368" rel="nofollow">http://arxiv.org/abs/1011.1368</a></p>
Somebody knows about Wiktionary XML file structure?
<p>I'm going to parse a Wiktionary file in many languages (English, Japanese, etc). From here (<a href="https://stackoverflow.com/questions/25200094/parse-wiktionary-data-dump-xml-into-mysql-database-using-php">Parse Wiktionary XML data dump into MySQL database using PHP</a>) I see the basic structure of it. But my question is that what these elements stand for?</p>

<p>For example, I think the title under page element is a word in the vocabulary. But where is its translation in other languages? Where are its synonyms? </p>