In first, i give you permission to add invite new translators. You can add, remove, modify new translators.
In second, you need to translate master-*, motd and credits.
All changes from these files are synced with github by me on every Wednesday(today).
I see you allready translated motd and credits... I will sync it with github today. Only master with 50K strings left =).
If you have some questions, you can ask me on transifex.com (Vlasov Vitaly) or on this forum.
Thank you for contribution.