How to retrieve Metadatas from Java Script

Hi,

I created new Metadatas entries where I save titles in differents languages as you can see in the next capture:

Metadata.jpg1663x631 127 KB

My question is how I can retrieve for the information of each using mediaProxy.entryMetadata because of I want to get the text with JavaScript Player.

I'm not sure if it has to be mediaProxy.entryMetadata.title_en, or mediaProxy.entryMetadata.LanguageTitles.title_en

I've tried these options and I was not able to get the text from metadata (by example title_en or title_de when it has text of course):

So any suggestion?

thank you

Lluís