The answer is LATVIAN
The corresponding square is BALTIC
   by Dan Katz

Fight Club - Solution

The pictures are each cropped images of Kaiju Big Battel competitors.
Taking the Nth letters of the Nth images gives the answer, LATVIAN.

Losplantanos
eArgernon
moTanaru
silVerpotato
amerIcanbeetle
dinokAng
hellmoNkey