Our studio uses Trello and we write mostly in Hebrew. We cannot change the writing from right to left, and most messages that contain English letters come out completely wrong.
It's possible I have missed something, and would appreciate any help configuring Trello for right-to-left writing.
You can use this stylish thing, that I wrote to solve the same problem (it works in Firefox and souhld work on Chrome too).
It's fine for me. If you see need for some other RTL fixes that I didn't recognize, you can ask for it in the link above.
I just wrote a Trello RTL Support (Github) client-side solution.
It's still new, but has really help me.
Update (2014-12-15):
I added Hebrew language as another RTL language to supported list.
One thing you can do is mix Unicode rtl/ltr overrides. If the default is RTL, use the LTR override to write in English, and use the RTL override to get back to normal.
Ltr is ‭, rtl is ‮
For example, ahead I've done first ‮ second ‭ third ‮ fourth in HTML and copy-pasted the result:
first second third fourth
If you copy-paste the line into some text area and play around with the arrow keys on your keyboard, you'll find it pretty easy to realise that "second" and "fourth" are indeed rtl.
So just give everyone a page that has these overrides in copyable format. Since these are zero-width characters, it may make more sense to have two buttons like:
<button onclick="prompt('Hit Ctrl-C and close','\u8237\u8237')">LTR</button>
<button onclick="prompt('Hit Ctrl-C and close','\u8238\u8238')">RTL</button>
on some webpage and let your users copy the characters from there. Note that the characters have zero width, so they won't see anything in the box.
I wrote a userscript Trello RTL Support (Gist) that adds right-to-left support to Trello boards for RTL languages like Persian, Arabic, and Hebrew.
I just had the same problem but I fixed it without any extension or options. Just be careful to write the first word of your comment in your RTL language and then Trello makes that comment totally RTL. But if the first word is in English, the whole card will be LTR, and thus writing an RTL language mixed with LTR will make that comment look quite messy.
