There's a whole list at
http://nl.wiktionary.org/wiki/kakkerlak 
(I hope I get all the languages right as they are in Dutch on that page)
* Alabama: iskanpatha
* Armenian: ուտիճ (hy) (utich)
* Bosnian: žohar (bs) m
* Bulgarian: хлебарка (bg) (khlebarka) v
* Catalan: escarabat (ca) m
* Chinese: 蟑螂 (zh) (zhāngláng)
* Danish: kakerlak (da) g
* German: Schabe (de) v, Kakerlake (de) m
* English: cockroach (en)
* Esperanto: blato (eo)
* Finnish: torakka (fi)
* French: blatte (fr) v, cafard (fr) m, cancrelat (fr) m, coquerelle (fr) v (Quebec)
* Greek: κατσαρίδα (el) (katsarĂ*Ă°a) v, μαυρομαμούνα (el) (mavromamĂşna) v, βρομομαμούνα (el) (vromomamĂşna) v, βλάττη (el) (vláti) v, κανθαρίδα (el) (kantharĂ*Ă°a) (ongewoon) v
* Hebrew: ג'וּק (he) (juk) m
* Hongarian: csótány (hu)
* Ido: blato (io)
* Indonesian: kecoak (id)
* Interlingua: blatta (ia)
* Italian: blatta (it) v, scarafaggio (it) m
* Japanese: ゴキブリ (ja) (gokiburi)
* Korean: 바퀴벌레 (ko) (bakwibeolre)
* Latin: blatta (la) v
* Lituwanian: tarakonas (lt) m
* Luxembourgish: Kakerlak (lb)
* Mongolian: жоом (mn) (joom)
* Napolitian: scarrafĂłne
* Norwegian: kakerlakk (no) m
* Papiamento: kakalaka
* Persian: سوسک (fa) (susk)
* Polish: karaluch (pl) m
* Portuguese: barata (pt) v
* Romanian: gândac (ro) m
* Russian: таракан (ru) (tarakan) m
* Slovenian: ščurek (sl) m
* Spanish: cucaracha (es) m
* Czech: šváb (cs) m
* Turkish: hamam böceği (tr)
* Urdu: جهنگر (ur)
* Swedish: kackerlacka (sv) g
