(--------)
Hello,
Well, this is not possible (yet), but this should be easy to fix for us.
In the mean time, could you post here a very simple example of what you are expecting ?
Something like this ?
@startuml state "This is my "state" with quotes" @enduml
You can have
@startuml state "This is my <U+0022>state<U+0022> with quotes" @enduml
http://www.plantuml.com/plantuml/uml/SoWkIImgAStDuG8oIb8Lb48oCeiLW2YtKi4cLDl0mCZ83Ym3uoYKPvPaA1IMvfUa5YjnEQJcfG0r0m00