▁Jean - Mich el ▁Kind t ▁as ▁Lak ar ▁ ▁Kurt ▁Sch ie gl ▁as ▁Fa um ▁ ▁Brian ▁Gill ▁as ▁Mod oc ▁ ▁Terry ▁F itt ▁as ▁H our k ▁ ▁Bib i ▁Cas par i ▁as ▁G amm la ▁ ▁Peter ▁Elli ott ▁as ▁Mik r ▁ ▁Mich elle ▁Led uc ▁as ▁Mat r ▁ ▁Robert ▁Lav o ie ▁as ▁Ts or ▁ ▁Matt ▁Bir man ▁as ▁Mor ah ▁ ▁Joy ▁B ous hel ▁as ▁S ura ▁ ▁Christian ▁Ben ard ▁as ▁Um bre ▁ ▁Tar lo k ▁Sing ▁Se va ▁as ▁T ava wa ▁ ▁L ol am al ▁Kap is isi ▁as ▁Fire maker ▁ ▁George ▁Bu za ▁and ▁Antonio ▁Bar ich iev ich ▁as ▁K z amm ▁tribes men ▁ ▁Production ▁ ▁Writing ▁and ▁character ization ▁Special ▁language ▁forms ▁were ▁created ▁by ▁novel ist ▁Anthony ▁Burg ess , ▁while ▁patterns ▁of ▁movement ▁and ▁gesture ▁were ▁developed ▁by ▁anth rop ologist ▁Des mond ▁Morris . ▁The ▁more ▁advanced ▁language ▁of ▁the ▁I v aka ▁was ▁largely ▁that ▁of ▁the ▁C ree / In uit ▁native ▁people ▁of ▁northern ▁Canada , ▁which ▁caused ▁some ▁am usement ▁among ▁those ▁in ▁this ▁group ▁who ▁saw ▁the ▁film , ▁since ▁the ▁words ▁have ▁little ▁to ▁do ▁with ▁the ▁plot . ▁ ▁The ▁U lam ▁are ▁port rayed ▁as ▁s tere ot yp ical , ▁Ne ander th al - style ▁cav emen , ▁in ▁an ▁intermediate ▁stage ▁of ▁development ▁compared ▁to ▁the ▁a pe - like ▁W ag ab u , ▁on ▁one