No 10’s former integration czar Dame Louise Casey had called for at least £200million to be spent implementing her recommendations.
She said the £50million allotted by Communities Secretary Sajid Javid was not enough to deliver the “seismic” shift outlined in her hard-hitting report.
Her year-long study slammed consecutive governments for failing to handle the downsides of mass immigration.
The strategy sets out plans for a series of “conversation clubs” across the country for migrants to practice their English but charities said these couldn’t make up for the “huge shortfall” in funding for classes.
Ex-chief prosecutor and deradicalisation expert Nazir Afzal branded the long-awaited strategy a “missed opportunity”.
He said two anti-extremism charities he is a patron of delivers English language classes to hundreds of people every year - and could train thousands more with enough funding.
Stephen Hale, head of charity Refugee Action, said: “The Government’s plans are all mouth and no trousers without new investment in accredited English lessons.”