Thx for the updated translation. I haven't commited - see the NB below. Please submit it by e-mail to translations at pivotx.net next time - as mentioned in the documentation
Issue 1: There are no strings "Leave a comment", "will not be published" in the default PivotX templates and hence they can't be in the po file. Maybe this is something you have added to the templates yourself?
Issue 2: Yes, I agree. I'll fix it after we have released PivotX 2.2 (to avoid breaking existing translations).
Issue 3: Yes, maybe the two first is easier to translate if you know the context, but rest of them should be OK to translate - the strings mean exactly what they say. (We should avoid strings like "on", though.) "Nothing/Latest on <strong>%s</strong> for <strong>%s</strong>" means "Nothing/Latest on some website for some tag".
Issue 4: Textile, Markdown and Smartypants are proper names.NB!
Always grab the latest po files from SVN or http://pivotx.net/dev/translation-stats.html
(as mentioned in the documentation
). The po file you sent me had several wrong headers - in particular an older "POT-Creation-Date" ... And it contained one string too much and two strings were still missing.
PS! I hope you are using a proper po file editor like POedit or Virtaal.