The logic we have in our mind is turned upside down in the Wonderland (and that is probably why the furnitures are up sided down in the entrance of the Wonderland).
English is spoken in the Wonderland but still a different language is spoken.
In the Wonderland, there are many strange creatures, like singing flowers, Water pipe smoking Caterpillar, a cat which can disappear etc. Those actions are possible because it can be described in words. Everything must be logical in that country , so everything which are able to describe can happen in that world.
In this world , everything can be said must have an existence.
Grammar for words is not really necessary in the Wonderland. As long as a sentence is logical and understandable, they do not need to know the grammatical system for deriving words. Alice often complains because she does not understand the sentences the creatures say, that is because they say sentences which are not quite grammatically correct in our world.
In our world, everything needs to be logical, and in the Wonderland everything is logical. We have no limits to talk about anything in our world, but there are limits to make the people to understand the things you say.
In the Wonderland however, everything is possible, so there are no limits for understanding things. You can say anything you want and it actually exists.
A caterpillar sitting on a mushroom smoking does not make sense in our world , that is why the word ‘fantasy’ is made, But in wonderland there is no word like ‘fantasy’.
Reality equals to fantasy. It is possible that the creatures in Wonderland have a wider range of knowledge because they have a bigger reality (and not a separated world called ‘real world’ and ‘fantasy world’)
Which one of the both is the insane world? We say that the Wonderland where Alice made her adventure is insane but they will say the world of ours is not sane.
Which world speaks the right English?, Which world speaks the right language? Nobody can tell.
This can be seen as a cultural problem, Wonderland is just another country made by an author called Lewis Carroll.