Sort separator parameter does not show up for Arabic author name

[israelcefrin]

Please follow the general troubleshooting steps first:

• [ x ] I read the README and followed the instructions.
• [ x ] I am sure that the used CSL metadata follows the CSL schema.
• [ x ] I use a valid CSL stylesheet

Bug reports:

In Open Journal Systems, we use citeproc-php to render citation format. It turns out that when using names in Arabic language, the sort-separator, usually a comma "," is not being displayed. See an example from this link on "How to cite" section:
https://journals.ku.edu.kw/jgaps/index.php/jgaps/article/view/2963

When using English locale, there is a comma separating Family Name from the initial of the Given Name. Switching to Arabic, the comma disappears.

Used CSL stylesheet:

apa.csl

Used CSL metadata

Please replace these lines with your used metadata, for instance:

[
    {
        "author": [
            {
                "family": "تاج الدين", 
                "given": "الياقوت"
            }
        ]
    }
]

English

Arabic