[Mailman-i18n] PMS localization

[Berto 'd Sera]

Hi everybody,

I'm preparing the PMS localization for mailman, that will be used to run a
wikipedia-related list at WMF. 

I wanted to ask you guys if:
1) is it a problem that we have a 3-letter ISO 639-3 code?
2) what do the %(year)i-like messages mean? I take it that %(year) will be
substituted with the year value, but what is the final "i" for? Is there any
guide I can use?

Thanks :)
Berto 'd Sera
Skype: berto.d.sera
Personagi dl'ann 2006 per l'arvista american-a Time (tanme tuti vojaotri)
http://www.time.com/time/magazine/article/0,9171,1569514,00.html