In Hotel, especially at five stars hotels in Bali, communication in English is a must! English is International language, every body must be able to communicate in English. According to my experience in Hotel Padma Bali, Grand Hyatt Bali, mostly communication in English, for example ini briefing and correspondence.
If you want to go abroad, work in Cruise Ship, or in America, please prepare your English well. Otherwise, you will never passed the interview.
How about me?
My English is still poor. I Just only a dreamer someday I could speak in English well, may be someday or in next reincarnation I will have a chance to learn in UK for couple years, so I could guarantee I Could communicate in English like a native.