When you import dwgs revit has a file that controls what the change into you can modify that to have the autocad txt look like your text.
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Yes, you are correct. When importing a dwg file into Revit, you can
always map the .shx fonts used in an AutoCad drawing to a TrueType font
in Revit. You simply need to go to find the "shxfontmap.txt" file under
C:\Program Files\Autodesk Revit 5.1\Data folder and to modify it.