不法侵占

【法】 illegal encroachment

不法的英语翻译：

illegitimacy; iniquity
【法】 malum in se; unlawful

侵占的英语翻译：

break into; invade and occupy; misappropriate; seize; steal; trench on
usurp on
【法】 arrogate; arrogation; convert; encroach; encroachment; malappropriate
malappropriation; misappropriate; misappropriation