Figures show that German, especially, has plummeted, with only 610 students accepted on degree courses last year, compared with 2,288 a decade ago. French is the second biggest casualty, with numbers dropping by a third from 5,655 to 3,700 in 10 years.
Overall, the figures show the number of students accepted on to language courses has slumped by almost a quarter during the past decade.
The researchers, from the School of Oriental and African Studies (SOAS) at the University of London and the University of Stirling, say there was a "steep decline" in the first half of this decade – with overall numbers tumbling by 20 per cent. Since then, French and German have continued to fall – although the decline has been partially offset by a rise in those studying newly-available languages such as Mandarin and Arabic.