Hello,
Arabic (ar), as international code.
See https://support.kobotoolbox.org/language_xls.html?highlight=multiple%20language
You may find some hints here
https://community.kobotoolbox.org/t/can-i-make-a-kobo-questionnaire-with-two-view-arabic-and-english/8808/2
https://community.kobotoolbox.org/t/multi-language-ar-en-survey/3080
https://community.kobotoolbox.org/t/use-primary-language-when-translation-isnt-available/8631/5
And more if you use the search function of this forum, e.g. with token “Arabic”
