Yes, Portable Object (*.po) files are supported in all versions of WorlsServer by the
Portable Object Studio File Type. This file type extracts
msigds text as the source segment and
the
msgstr text as the target segment. For instance, in the source *.po file you might find:
msgid "Quality"
msgstr "Quality"
After segmentation, the
msgid text will appear as source segment. The target segment will appear as empty (unless there is a 100% or ICE match everage from the TM).
After translation, in the target *.po file, the
msgid text original text will be replaced by the translation. Example:
Target file:
msgid "Quality"
msgstr "Qualità"
This is the same behaviour as in Trados Studio. However, be aware that until WorldServer version 11.7.3, the behaviour of the
Portable Object Studio File Type was different in WorldServer than it was in Trados Studio. This has been changed and aligned starting from WorldServer version 11.8.1:
WorldServer - Portable Object File Type not populating Target Field 
