text style and true type fonts

[Anonymous]

I do not understand the Font-style conversion dictionary, to export from AC to DWG.
I did exactly what is into the manual; except that I asked for the Arial western (not baltic) Archicad font and I created the AutoCAD Arial_W style.
So AutoCAD effectively created an Arial_W style but of course replaced the Arial "Western" font by the default (simplex in my case) one. These "western" "Baltic" or "Arab" font script are not recognized, AutoCAD does not convert them to True Type Arial.ttf.
And even if you change Arial Western font to Arial true Type after import, the text does not behave like a true type text. Only the new texts are really True Type.
I tried to import usual windows Arial texts, from Word or Excel. Arial is Arial and Courier is Courier, there is no problem, AutoCAD seems to use standard windows (IFAIC) True Type fonts, and no damned Western, Baltic or whatever fancy font name.
What's wrong? I heard about creating an "xml conversion document", what that, where is the syntax of this stuff explained ?