Ottoman Turkish and Arabic had different writing systems: the Ottoman Turkish alphabet used Latin, Arabic, and Chinese figures, but Arabic only uses Arabic figures. To learn Ottoman Turkish, you could go to http://iwannalearnancient.com. The website is written in Arabic, but on the top you should find the Translate this Page, and translate into English or whatever language you speak.
Babylon offers software that will translate English to Arabic, incuding English into Arabic script, over the internet. Google offers a free online translation service that instantly translates both text and web pages. Online or pocket dictionaries are another translation source. Voice Translator is a free app for Android phones that will translate what you say in English into Arabic.