Except that what this site is demonstrating isn’t so much “right-to-left” as “the pain users of right-to-left languages experience when you implement things badly, especially with regards to BiDi problems”.

Not sure I understand how it demonstrates BiDi problems.

The real BiDi problems come when you got a context of LTR in RTL.

For example:

אני חושב שזה cool לכתוב מילה באנגלית.

This is where things goes wrong. And we didn't even start with text selection...

The site demonstrates the problems in two ways:

① Setting `text-align: right` so that you can feel the weirdness that `text-align: left` will produce for RTL languages.

② And for BiDi: setting `direction: rtl`, and using a mixture of strong LTR characters (e.g. letters) and neutral characters (e.g. punctuation). This combination results in the neutral characters going RTL, which is why you end up with things like “.solve them” and “→ ?What is this” rather than “solve them.” and “What is this? →”.

It’s demonstrating things that are commonly done wrong the other way (when the document says it’s LTR, but contains RTL text).

It's not the homepage but the site has an entire article on the exactly this.

https://rtl.wtf/explained/bidiintro.html

.pot ot mottob morf ti daer ot evah ouy taht si hgouht sdrawkcab gnitirw htiw melborp ehT .ti edulcni dna kcabdeef ruoy etaroprocni lliw srenwo etis eht ebyaM .dnif ot gnipoh saw I pilf niarb eht saw sihT.

nah, if you use `unicode-bidi: bidi-override` and force `direction: rtl` it'll still flow top to bottom. a conlang I speak is cursive RTL so I've made extensive use of this. side-note: it's a major peeve of mine that Unicode's entire Private Use Area is plain Latin in terms of properties. there's no way of setting RTL other than using CSS or prefixing an RTL Override character, which gets old fast in text editors. no font system, including Graphite, lets you override Unicode glyph properties to my knowledge.

Surprisingly readable

I think all West Asian scripts are is right-to-left, then top-to-bottom. I think Japanese/Chinese scripts can be top-to-bottom, then right-to-left, but may vary. I don't think there's are any bottom-to-top?

> I don't think there's are any bottom-to-top?

There are philipino and indonesian scripts which ars written bottom-to-top, though they are read left to right.

Ogham is bottom to to though.

I think there’s also a script which is read and written based on cardinal directions, but i can’t find it. I was expecting it to be indigenous australian (as several IA people use absolute directions as a matter of course).

That's really fascinating. Thanks for sharing

What exactly due you mean by "West Asian"? Georgian and Armenian are left-to-right.

I was painting with too broad a brush. Of course it's not all languages across that region

איבן בטר, וואי נוט רייט איט אין אה פרופר רייט טו לפט לנגואג׳?

Because then the site would not demonstrate the pain caused by poor RTL support, as most of its target audience will not be able to make sense of the script.

The point is that even when you understand the script and the language, you find yourself looking at a website with messed up formatting, punctuation in the wrong place, and broken sentences when BiDi gets involved. Those of us who deal with this all the time are used to it, but most people have no idea how broken things are.