IDK
Who said: "The Skypeople have sent us a message-that they can take whatever they want... and no one can stop them... but we will send them a message. We'll ride out as fast as the wind can carry us. You tell the other clans to come. My brothers, sisters! We will show the Skypeople, that they cannot take whatever they want! And that this... This is our land!"
Or, in Na'vi: "Tawtute ayfo tsun munge whatever ayfo neu. Si kea 'aw tsun ftang them. Slä ayoeng will fpe' them 'upxare. Nìltsan makto out na nìwin na hufwe tsun carry us. Nga peng lahe ayolo' ne za'u. Ma aysmukan, aytsmuke! Ayoeng will wintxu tawtute tsa'u ayfo cannot munge whatever ayfo neu! Si tsa'u fì'u... Fì'u our atxkxe!"
(( Yes, I translated all that myself. ))