English (Source)
Towers gain experience <Highlight>{{TOWER_EXP_GAIN_CHANGE_PERCENT:percent}}%</> faster but upgrading them with gold costs <N_Highlight>{{LEVEL_UP_COST_CHANGE_PERCENT:percent}}%</> more.
Japanese Translation
塔は経験値を <Highlight>{{TOWER_EXP_GAIN_CHANGE_PERCENT:percent}}%</> 速く得るが、ゴールドでのアップグレードに <N_Highlight>{{LEVEL_UP_COST_CHANGE_PERCENT:percent}}%</> 余分にかかります。