There are two ways to use Online English to Persian (Farsi) translation via Pars Translator:
Simplest way is to select "Translation" from "Online Services" menu or click here . You will redirect to translation page. You can enter your text in that page and send it for translation.You shouldn't enter text more than 150 words. To see the result of translation, your should install Persian (Farsi) font. You should read "How to install Persian Farsi) font" .
Another way to use Pars Translator services is downloading Pars Translator Client (Click here to download). With this software , you are able to enter your text or words for tanslation. You have your own Dictionary or Translation . When you are not connected to Internet, you are able to see your previous result .