Can you open an issue here https://github.com/NodeBB/NodeBB/issues
Wrong default language
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
defaultLangis not set, so defaults to english, and highlights the first language, which is arabic