lot of errors/bugs with Template Hotel

Hello from Germany,
I'm very amazed of the high Quality Templates from Gavick, may the best online solution for "Nice View" on Websites.
I'm already fighting with the Template Hotel, i have two main problems with the Template:
1. How can i set the Booking sytem and the others modules in German/Spanish Language? Where is the file: *.ini to set the changes? I want to create/manage a Site in 3 Languages. Default is at the current moment Elglish.
2. I cant not find a Multiligual solution from third components and decide to work with the Joomla Plugin "Language filter" and the Modul "Language switcher". These are activate and the Modul set on position "lang". The Problem is: The Modul is hidden anywere, not appear, Template don't display the Modul. I try to set the Modul in anothers positions but is the same: Modul is hidden.
Dear Moderator, have you some helpfull Tipps for me?
Test Site: http://2017.casarolando.com/index.php/de/
Regards from Germany
Some screenshots:

language_error.jpg

language_error2.jpg

language_error3.jpg

Hi

1. You can translate it in en-GB.plg_system_gkreservation.ini and en-GB.plg_system_gkreservation.sys.ini files in joomla language folder

2. It does not appear when multilanguage is not configured correctly. Please chek this instruction to make sure everything is correct: https://www.gavick.com/documentation/jo ... joomla-1-7 For the app to handle multilanguage I would suggest Falang.