We are all familiar with English quotation marks: “these” (double) and ‘these’ (single). The American style (and the prevalent style in the UK up until the beginning of the 20th century) prescribes double quotation marks for non-nested quotations, whereas contemporary British publishers lean towards single quotation marks (where single quotation marks, also called inverted commas, are used almost exclusively in fiction).
Nevertheless, the differences between American English and British English, as interesting as they may be, are not the topic of this article. There are five main types of quotation marks, which could be called English, French, German, Polish, and Swedish, represented by different colours on the map below: