Hello,
for sef translate you need install Sef translate component and sef translate module
ordasoft.com/SEF-Translate/seftranslate-...ture-comparison.html
In module- you will set languages for translate.
Next by default - sef translate set for translate as redirect. But you may configureit for work as aJax translate use Bing translate service. For that you need configure yours sef translate components options.
For more details, Please check component help page
Thanks,
OrdaSoft team