Multi Languages and indexing on google

[need4speed]

I have this Prestashop 1.5 which have 3 languages, the main languages is english and the two others are danish and german.

 

But to me it seems like its only the english page that is being indexing or am I wrong ?

 

The english URL is

http://hd-fireplace.com/en/

 

Danish

http://hd-fireplace.com/da/

 

German

http://hd-fireplace.com/de

 

I hope you can give me some good SEO suggestions to my HD Fireplace project