WordPress translator plugin error

Hi,

I am using taranga translator plugin for my wordpress blog when i try to do translation i am getting the following error

We’re sorry…
… but your query looks similar to automated requests from a computer virus or spyware application. To protect our users, we can’t process your request right now.

We’ll restore your access as quickly as possible, so try again soon. In the meantime, if you suspect that your computer or network has been infected, you might want to run a virus checker or spyware remover to make sure that your systems are free of viruses and other spurious software.

We apologize for the inconvenience, and hope we’ll see you again on Google.

I am using free version of taranga translator plugin.This plugin is free or not any more.

If this is not free can some one suggets me free translator plugin for wordpress.

Thanks for your help