There should be someone who can speak English so don't worry.
I'm sure someone speaks English there.
I'm sure one of the workers speaks English
There should be someone who can speak English so don't worry.
英語が話せる人(従業員)がきっといると思うから大丈夫、心配しないで。
I'm sure someone speaks English there.
きっと誰か英語話せる人いるよ(従業員)
授業員と詳しく言いたい場合:
There should be someone who works there that speaks English.
I'm sure one of the workers speak English (従業員の中で英語話せる人いるよ)
ご参考になれば幸いです。