Would it be possible to maintain a custom comments in PO files of the template set? Sort of what translate-toolkit utils add, "# (pofilter)"?
The use I have in mind for that right now is keeping meta-information, e.g., hints for translators. Sort of: "the term XYZ in this record relates to record ID4 (e.g., namedlg.src#RID_SCDLG_NAMES.STR_HEADER_RANGE.string.text)" or "translate in line with ID1, ID2, ID3" or "option name, not command".
Yury