When I search the help in NX, I get the following:
It doesn't say anything about extra translators
this is help for "open part file dialog"
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Files of Type
Displays only files that have the selected filename extension. Also, the system automatically saves the part file with the extension displayed in this field.
The extension filters are:
Unigraphics NX Part Files (*.prt)
User Defined Feature Files (*.udf)
Solid Edge Assembly Files (*.asm); only on Windows Intel platforms (does not include AXP)
Solid Edge Part Files (*.par)
Solid Edge Sheet Metal Files (*.psm)
Solid Edge Weldment Files (*.pwd)
Bookmarks (*.bkm)
CATIA Model Files (*.model) - CATIA model files; only appears on Windows Intel platforms; does not appear on the 64-bit Itanium platform. For more information, see the Translators Help.
I-DEAS Exchange Packet (*.xpk)
Teamcenter Visualization (.jt)