Sorry missed that. These are a bit more difficult to change. You will find an excel file in your design data folder with all thread names. For me that file is located here:
C:\Users\Public\Documents\Autodesk\Inventor 2022\Design Data\XLS\en-US\thread.xls
In there you will find a tab for each thread type. You can alter the "Custom Thread Designation" column with a different decimal separator.
When you save excel and restart Inventor you will notice that your drawing is NOT updated. You will need to reset your hole with the correct information in your part. Only then will you see the changes in your drawing.
Here you see that I have the old and new data in my hole feature:

Jelte de Jong
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