you can do that by adding the html entities or by adding it by copy and paste.
But if you are writing in text-block editor and using the standard key ( shift 2 ) from your keyboard – it will insert the english opening and closing double quotes.
The language than decides how they will look like on frontend – if you choose french as page language they will automatically translated to those Guillements. in German we have those curly brackets ( and the ampersand function only changes the straight double quotes to curly double quoutes by wrapping in a span with class ) etc. pp.
But now – if your page is set to german and you like to have those guillemets this is an option to do so.
PS:
On mac german keyboard ( QWERTZ)
« : option q
» : shift option q
