In order to convert the English text to Telugu font you can try Wordinn Dictionary 2010. This is an easy to use and free application developed by Wordinn. The translation is powered by Google Translate.
If you want to type Telugu font in your Microsoft Office Word document you need to download the font from Google Input Tools web page. Select Telugu, click the Download button and install the application. Go to Control Panel > Clock, Language and Region > Change display language > Keyboards and Languages > Change keyboards > Language bar > and select Docked in the taskbar. Click OK, open your Microsoft Office Word document and select TE Telugu (India) from the language button from the taskbar. Now you will be able to type Telugu font in your Word document.