If you create a drawing and a question mark appears "?" instead of Å/Ä/Ö, then this is due to the fact that AutoCAD can't "read" the Swedish language pack. This is all described in the ISO.shx file. What you need to do is to copy and replace the ISO.shx file from the Strusoft folder to the Autodesk folder. In this example, AutoCAD 2019 is used. See the picture below. 

You can download the ISO.shx file here

and place it in the AutoCAD/BricsCAD folder if you do not have IMPACT for CAD installed. The version or program doesn't matter, this file can be placed in all AutoCAD and BricsCAD folders.

This also applies if you only have Reinforcement for CAD. 

Figure 1: Copy or download and paste the ISO.shx file from the StruSoft folder to the Autodesk folder.

Figure 2: Copy or download and paste the ISO.shx file from the StruSoft folder to the reinforcement folder.