To describe someone with long hair in Engpsh, you can say "She has long hair" or "His hair is long." You can also use adjectives to describe the length or style of the person's hair, such as "her flowing locks," "his shoulder-length mane," or "their cascading tresses." Additionally, you can use phrases pke "a head of long hair," "a mane of hair," or "locks of hair" to describe someone with long hair.