Hi Eva,
This forum is dedicated to issues with the translations of our plugins, and not to issues with multi-language / WPML issues.
If you need help with the above topic and you have a valid license to Events Calendar Pro or another plugins, then please log in to your account at theeventscalendar.com and open a thread in the respective forum. In this case, to speed up support, please share your system information (https://theeventscalendar.com/knowledgebase/sharing-sys-info/) and give us a detailed description of the issue.
If you are without a license you can post your question in the wordpress.org repository here: https://www.wordpress.org/plugins/the-events-calendar/support/ and either one of our support folks or the community will help you out.
To get you started, you might want to check out this article, might help you solve the issue:
https://theeventscalendar.com/knowledgebase/setting-up-the-events-calendar-with-wpml/
Thanks and cheers,
Andras