In reply to Steve Hillis.

There are three directories in the most recent releases of SAS 9, which configure a SAS session to run with various encodings.

The en directory is used for the wlatin1 encoding, which is used by many English-speaking users. The u8 directory is for UTF-8 encoding. The 1d directory
configures SAS to run with a double-byte character set (DBCS) encoding that supports Asian languages. That configuration supports multi-byte characters, but uses English resources instead of the translated messages and templates. I am not an expert on encodings, but see Bouedo (2020) for an overview. My limited understanding is that most people use UTF-8 for running SAS on data that include multi-byte characters. I don't know why your system is using 1d.