There are no tokens specific to the Arabic language.
Usually, when setting-up diaries that use Arabic, you will use 2 types of tokens:
If you use Unicode-enabled Arabic fonts, then you can set your tokens the same way as you would set them up to display English, for example. For tokens that use legacy AXT Arabic fonts, then you should use the trick of only setting the opening brace of the token in the desired AXT font, otherwise the result will look weird as AXT fonts map Arabic to the Latin code pages.
token with opening brace only in AXT font
token entirely set in AXT font
If you need the Arabic text resulting from a token to be justified (ie. to use Arabic kashidas), then you will need to apply the QppArabic H&J set to that token.