Hi @Adage,
I personally have not used LocoTranslate but do know that we have not made an intentional effort to be fully compatible with it. We have integrated The Events Calendar with WPML and that is the only translation plugin we can speak for at the moment.
That said, it is possible that The Events Calendar and LocoTranslate are compatible–we just haven’t tested it. I would suggest testing them out together on a test site to see how they work together with the latest versions. That is the best way to ensure nothing is lost when you update.
Cheers,
Geoff