Hi HN im one of the authors of this article. The location algorithm is based on data from a dialect quiz conducted by the "Tages-Anzeiger" newspaper in cooperation with "Der Spiegel" in 2015. More than 800,000 people from more than 23,000 towns and villages took part and told us which words are used in their region. For the map published here, the calculation compares your answers with those of the 844,140 people surveyed and shows which participants have the highest agreement. The bluer the coloring of a location, the higher the level of agreement with the respondents from that location.