I thought I saw a tool in Microsoft Word that would allow translations to another language. I did an index search and found this...

Translate or look up text in the dictionary of another language
The feature described in this Help topic is only available if support for the language you are translating is enabled through Microsoft Office Language Settings.

You can look up text in the dictionary of a different language, and perform basic translation of short phrases.

On the Tools menu, point to Language, and then click Translate.
Under Translate what?, do one of the following:
To translate a specific word or short phrase, click Text, and then type it in the Text box.
To translate text that is selected in your document, click Current selection. If no text is selected, you can select it now.
In the Dictionary box, select the languages you want to translate from and to. For example, if you want to translate English to French, click English U.S. to French France.
The languages that appear in the Dictionary box depend on the language dictionaries that are installed on your computer.

Click Go.
The results appear in the Results box.

If you want to replace selected text with the translated text, select the translated text in the Results box, and then click Replace.
Note If the translation tool doesn't provide the results you want, or if you need to translate a longer piece of text, you can connect to translation services on the World Wide Web. Under Translate via the Web, select the translation service you want, or select (More translation services), and then click Go.

I searched translate English to Arabic... hopes this helps!