I don't understand much Arabic, but I know the alphabet almost as well as the Latin alphabet. If you see something in Latin along the lines of "svciwbc oaoøoaaö", and claims to be Gaelic or whatever, you'll know that something is off - the consonants and vowels just don't work that way.

It won't fool the people who can speak the language, but I think the website is just designed to educate people so that it doesn't look like complete nonsense.

Facebook is surprisingly an offender here. It's common to mix both Arabic and Latin, say, begin with بسم الله and then write the text, sometimes in english, and it'll throw off the alignment of the text completely. You get the Latin words right aligned or the Arabic one left aligned.

Edit: I'm actually quite surprised how well HN handles this.