We're trying to make P2 multilingual-ready and need some tiny modifications in the theme.
1. The HOME URL needs a filter. This would allow it to go to the correct 'home' per language.
2. Use the WP permlink instead of manually calculating links with 'guid'. This will allow adding language attributes to links.
These changes will only make P2 more robust and function better with other plugins. They are not specific for multilingual support.
Thanks for considering!