With the new capital status, the city's centre was rebuilt and a continuous growth was sustained. By 1880 the population had grown almost ten-fold to 43,000, mostly due to industrialization. This brought ever-increasing numbers of new Finnish-speaking working class from around the country to the largely Swedish-speaking city. In the 1870 census 57% of Helsinkians spoke Swedish as their home language, 26% Finnish, 12% Russian and 2% German, while also increasing numbers of residents were capable in both Swedish and Finnish. Helsinki slang is believed to have first began to evolve among the mixed-language working-class people of the 1880s. In addition to Swedish and Finnish, influence came from Russian and German.