Scale depends on the DWGUNIT that you set in your translator when exporting. The reciever must use the same unit or scale will be off, example 1 dwgunit = 1 ", or better, 1 dwgunit = 1 mm
However, I remember a bug in the AC9 dwgtranslator - it incorrecly didn't set the INSUNITS parameter to the same DWGUNIT. But I thought that affected only metric translations.
AC4.1-AC26SWE; MacOS13.5.1; MP5,1+MBP16,1