The problem is, that the original language file is not up-to-date!
You can use Loco Translate to sync the original file – then sync your language file and then you are able to translate this!
All support requests relating to any of the premium add-ons that exist that work alongside Caldera Forms Free must be submitted through Priority Support on our website at calderaforms.com/support. This includes presale questions and “free” premium plugins such as Caldera Translate. This is a rule of WordPress.org (see https://wordpress.org/support/guidelines/#do-not-post-about-commercial-products) as well as the business model by which we are able to provide a free, fully featured form builder plugin to you and over 100,000 other WordPress users.
Thanks for understanding, and we’ll get to the bottom of your issue in 1 business day or less in Priority Support. I’m aware that your thread is a series of presale questions.