Puedes implantar un form.
Código HTML:
Ver original<form style="text-align:center" action="http://translate.google.com/translate"> <input size="60" value="http//tuweb.es" name="u" type="hidden"> <br> <span style="font-size:12px;">Traducir
</span><select name="langpair" onchange="this.form.submit()"> </select><input value="es" name="hl" type="hidden"><input value="UTF-8" name="ie" type="hidden"><input value="UTF-8" name="oe" type="hidden"><input value="/language_tools" name="prev" type="hidden"></form>