Someone who plays the flute. The thing worth knowing is the spelling: American English writes 'flutist', while British English writes 'flautist', with an 'au'. They are the same job and the same person.

Someone who plays the flute指會吹長笛（flute）的人 The thing worth knowing is the spelling值得知道的是拼法 American English writes 'flutist'美式英文寫作『flutist』 while British English writes 'flautist', with an 'au'英式英文則寫成『flautist』，多了一個au They are the same job and the same person兩者是同一份工作、同一種人

In Taiwan, school English mostly follows American books, so you will probably meet 'flutist' first, but concert programmes and classical music writing often use 'flautist' even in places that otherwise write American English, because it sounds more formal to some ears.

In Taiwan, school English mostly follows American books在台灣，學校英文大多跟著美式教材走 so you will probably meet 'flutist' first所以你可能會先遇到『flutist』 but concert programmes and classical music writing often use 'flautist'但音樂會節目單和古典音樂寫作裡，常常用『flautist』 even in places that otherwise write American English就算其他地方用的是美式英文 because it sounds more formal to some ears因為對某些人的耳朵來說，聽起來比較正式

Either spelling is correct; just be consistent within one piece of writing. The word can mean a professional in an orchestra or simply a person who plays.

Either spelling is correct兩種拼法都對 just be consistent within one piece of writing只要在同一篇文章裡保持一致就好 The word can mean a professional in an orchestra這個字可以指樂團裡的專業演奏家 or simply a person who plays也可以單純指會吹長笛的人