。
Is there anyone here who speaks English?
Literal
Someone English [object-を] speak person [topic-は] exist [question-か].
A standard travel/emergency phrase. 誰か ('someone / anyone') is the indefinite pronoun. 英語を話す人 ('a person who speaks English') uses a relative clause modifying 人. います is the polite form of いる for animate existence. か marks the question. Simple, high-frequency, and practical — the kind of sentence every language textbook includes.