Tube Tongues, by Oliver O’Brien of CASA, maps the most popularly spoken language after English (based on 2011 Census aggregate tables released by the ONS, via NOMIS) but instead of examining the population living near each tube station, it looks at the population of each ward in London. There are 630 of these, with a typical population of around 10,000. The language is mapped as a circle lying in the geographic centroid of each ward.

English remains the most popularly spoken language in every ward, right across London.