An error such as WinAnsi cannot encode "ā" (0x0101) does not mean that mapped text fields are limited to WinAnsi / Windows-1252. The PDF generator now supports extended Latin text.

Mapped text fields support extended Latin text such as Mārtiņš. Invisible format characters, including zero-width spaces, are removed automatically. The WinAnsi / Windows-1252 list below is a reference, not an exhaustive list of supported characters; support for every Unicode character or script is not guaranteed.

You do not need to replace the supported extended Latin characters above or remove zero-width spaces yourself. If another character causes an issue, a targeted substitution formula can be a temporary workaround. The formula below illustrates character substitution; it is not required for the characters shown:

SUBSTITUTE(SUBSTITUTE(SUBSTITUTE({TITLE},"ā","a"),"Ā","A"),"​","")

This would substitute ā with a, Ā with A, and remove the zero width space character (that character may be stripped from this article, so you may need to insert it again between the second-to-last set of quotation marks if you're copying this example formula), in a field called TITLE.

If you need a substitution workaround for a different problematic character, use the resulting formula field in the field mappings for the PDF generator instead of the original text field. ChatGPT can help you generate a formula for the specific character(s) you need to replace.