Where can I change language "TABLE OF CONTENTS" into Spanish?

Need to translate "Table of contents".

Does anybody know where is the file where I have to translate it?
Thank´s.

It depends of which 'Table of contents' you mean. If you mean the 'Table of contents' when viewing a Nottingham template, that can be found in the xml file:

But, as far as I can tell, that is already done. So which 'Table of contents' do you wish to translate?

Hello Tom.

Thank you very much for your answer.

The engine_es-ES.xml seems to be ok.

I attach a file with a screenshot.

As you can see, TABLE OF CONTENTS is in English. And the complete progress bar too.

At the moment could not be very important for my project, but I would like to contribute with translations.

Where can I help?

I´ve discovered Xerte two days ago and very interested on it.

Thank´s again.

Then please verify that the language of your Learrning Object is set to Spanish:

Yes, it is in Spanish.

No result.

Could you try to export it, and post it here. It's so weird.