> - it takes string with regular expression</li>
</ul>

<p>Example: (police cars in Polish language)</p>
<pre class="highlight plaintext"><code>"police-cars": {
    "exp:^1$": "1 samochód policyjny",
    "exp:(((?!1).[2-4]{1})$)|(^[2-4]$)": "%d samochody policyjne",
    "exp:(.*(?=1).[0-9]$)|(^[05-9]$)|(.*(?!1).[0156789])": "%d samochodów policyjnych"
}
</code></pre>

<p>Powerful stuff, isn&rsquo;t it? :&gt;</p>

<p>PS. There is built-in solution for Polish language so you can use it with doing just this: