Is it possible to use replacer for arabic language?

Hello,
I am interested in using PDFTron for an arabic/english PDF.
My aim is to replace a string in english and another in arabic in my PDF.
The english works well:
replacer.AddString(“name”, “sara”)
but the arabic doesn’t
replacer.AddString(“سارة”, “اسم”)
I also tried to reverse them as per Right-to-left text search
replacer.AddString(“سارة”, “مسا”)

In the pdf the words are:
[name] and [اسم]

Is it feasible to replace Arabic words with pdfTron?

hello, can I please have some help? I sent an email request as well!