For example, a user added an idea, other users vote for it, but the administration decides that this idea can't be implemented for some reasons and gives it a "Declined" status. The idea remains in the top and in a widget, thus taking extra place....
Obligatory registration will only discourage users from making their suggestions, thus destroying the whole idea of the project. I saw users complaining that they had to register twice - on the main web-site and on the forum.
Official reply
Now...
At present, the project is aimed at the English audience, but if we get many requests for the multilingual version of the service, we will satisfy the demands.
It's good that you have a widget to the right, but it would be better to have various types of them and to be able to make them smaller or move around a webpage etc.
Do you have any particular needs?
Note also within few weeks new API is going to be added which will allow you to create your own widgets with your own design. I believe it will help.