The romanization system looks good. The only thing that will take some getting used to for me is to transliterate jiim as J… I personally prefer G, since the letter G can be pronounced either Egyptian (”go”) or Fussha (”giant”).

Looks good — pretty standard stuff. For the `ayn (or cayn, as you have it), will you be using the superscript ‘c’, as you often find in scholarly texts, or just a regular ‘c’? Alternatively, as you see above, I tend to use the [`] . . . as in, as-salaam `alaikum.

Judith, thank you for mentioning the Egyptian dialect. You make a great point about using ‘G’ to transcribe ج. We will use ‘g’ when transcribing the Egyptian variety to reinforce the hard ‘g’ sound that distinguishes Egyptian colloquial speech from other regional varieties.

Sean, the grave accent ` is definitely easier to type than ^c, but I often get it confused with the apostrophe ‘, especially when there aren’t any nearby for comparison. As for the ^c, it comes from the International Phonetic Alphabet symbol /ʕ/ for the sound made by ^cayn.

Bouks, the transliteration systems that you mentioned developed from native Arabic speakers utilizing western communication devices…SMS, text-messaging, etc.. which didn’t support Arabic script. The idea is 3 looks like ع and 7 looks like ح. But there is a lot of inconsistency with that system. For example, ج is transcribed as 7′ or ‘7 by different people. Native speakers of Arabic can get away with such inconsistencies because they can guess the letter from context.

Thank you all for such inspiring comments.
شكرا جزيلا - shukran jaziilan - Thanks a lot.