At nowiki it has become quite common to use newer characters to represent certain markup.
For example we use guillemets («») to represent a quote. This pose no problem on a linux machine, but we can't easily type them on a windows machine. Due to that we have added a shortcut in WikiToolbar, but we haven't done that in VisualEditor. We could instead add this as an input method, and replace an ordinary quote (") with correct guillemets. This will only work if we can set a default input method.
There are several other characters that also needs special handling, for example en dash wich is used in some situations.
Note that there are changes to how quotes are handled in Norwegian