Hi there,
We are unfortunately unable to provide support through our Pre-Sales forum channel, but you can head over to The Events Calendar WordPress.org support forums for assistance and answers.
If you have a PRO license, you can log into your account and get assistance through the PRO forums. If you need to reset your password, you can do so here. This will send an email to the account used when you initially registered for the support forums.
To get you started, strings are translated through .po / .mo files which you can find under ‘wp-content\plugins\the-events-calendar\lang\’ for example.
You can edit the translations with a plugin like Loco Translate or with an application like PoEdit.
These two articles might also be helpful:
Thanks for understanding and have a nice day!
Cheers,
Andras