English is not the first language for the majority of children in more than one in nine schools, it has been reported.
Last year the majority of pupils in 1,755 primary and secondary schools spoke another language at home, according to the Daily Telegraph.
The newspaper said in more than 200 schools English is not the first language of nine in 10 pupils, with as many as 14 different languages being spoken.
At some schools children arrive at the age of five with no experience of using English, the newspaper claims.
The number of pupils who have English as their second language is reported to have risen by a fifth to almost 1.1million in the past five years.
Of the 10 schools with the highest proportion of children who do not speak English as their first language, all but two are outside London, and all but one are rated good or outstanding by Ofsted, the schools watchdog.
The newspaper says schools have enlisted interpreters to help at parents' evenings and bilingual teaching assistants for reception classes.
Douglas Carswell, a backbench Tory MP, called for a "national debate", telling the Telegraph: "It's time for a national debate about the impact of social cohesion in Britain today. I want to make sure that we create first and second generation Britons."
A spokeswoman for the Department for Education said: "We are determined that all children, whatever their background get a first-class education.
"Our reforms to the education system, and the hard work of heads and teachers, are ensuring that is becoming the case - last week figures showed that a quarter of a million fewer children are being taught in failing secondary schools than three years ago."
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