when a user choose a RTL language, he will see all posts and topic right to left, even English posts!!
Like this picture:
I noticed on my installation, even one that I just did today, that the default language is set to Arabic and English (US) is not included in the list of language options.
Choice of language
Looks like a bug... in that I select the language if a language has been selected, but on new installs, the
defaultLang is not set, so defaults to english, and highlights the first language, which is arabic