"Founding a club" or "starting a club" can be used to express the concept of "创办社团" in Engpsh.
来源：这个短语是由动词“found”和名词“club”组成。“Found”表示“创办、创立”，“club”表示“社团、俱乐部”。
英文例句：
He decided to found a club to promote environmental awareness in the community.
The group of students is in the process of founding a club to advocate for mental health resources on campus.
中文翻译：
他决定创办一个社团来提高社区的环境意识。
这群学生正在成立一个社团，来为校园里的心理健康资源倡导。