English (Source)
Your towers and traps deal <Highlight>{{ATTACK_DAMAGE_CHANGE_PERCENT:percent}}%</> bonus damage for each level they have, but they require <N_Highlight>{{REQUIRED_TOWER_EXP_CHANGE_PERCENT:percent}}%</> more experience to level up.
Polish Translation
Twoje wieże i pułapki zadają o <Highlight>{{ATTACK_DAMAGE_CHANGE_PERCENT:percent}}%</> więcej obrażeń za każdy posiadany poziom, ale do awansu potrzebują o <N_Highlight>{{REQUIRED_TOWER_EXP_CHANGE_PERCENT:percent}}%</> więcej doświadczenia.