Since the answers are written in English for a predominantly English-speaking audience, I personally don't like to clutter my answers with Arabic text unless the exact literal translation of a word/phrase is important to the answer.
The Arabic text is readily available online, and whenever I quote an ayah from the Qur'an I add a link to quranQuran.com where the original text can be read. I believe that this should be sufficient, and leaves the answers easier to read.