How to make global redirection?

Hi,

First I want to apologize for my english, I am French.

My web site is http://www.toutle05.fr

At the beggining I have created it with 5 language + French by default. At this moment I realize that it is too much job to have done like that. So i’d like to cancelled 1 or 2 languages.

Cancelled everything in a specific language is not difficult but I know that I have to do something to avoid 404 page.

So, for exemple, if I want to cancelled the Dutch pages and redirect them to the English pages, is there a possibility via plugin or .htacces or… to do it without writing the redirection of all pages

All things of web site in English are strored under http://www.toutle05.fr/en/
All things of web site in Dutch are stored under http://www.toutle05/fr/nl/

Thanks for everyone who can help me.
Have a nice day.
Philippe