add this translation if you can Bulgarian: укрепване (bg) n (ukrepvane), усилване (bg) n (usilvane) Chinese: Mandarin: 防禦工事/防御工事 (zh) (fángyù gōngshì), 工事 (zh)
Bulgarian: усилване (bg) (usilvane) Catalan: amplificació f Chinese: Mandarin: please add this translation if you can Danish: forstærkning c Dutch: versterking (nl) f