“决定住处”常见的英文表达有 "decide on one's accommodation" 或 "determine one's place of residence"。
"decide on one's accommodation" 更侧重于对住宿地点或方式的最终选择，适用于一般语境。例如：We need to decide on our accommodation for the trip.（我们需要决定这次旅行的住处。）
"determine one's place of residence" 更强调确定居住的具体地点，常用于正式或法律相关的语境。例如：The court will determine his place of residence.（法院将确定他的居住地。）