Hi unfortunately there’s some structural issues with Leads, Landing Pages, and Calls to Action plugin so normal translation methods, including Loco Translate will not work.
Inbound Pro plugin, our all in one plugin has a translation system that people contribute towards via the Transifex.com service. Translations are disabled by default, but they can be enabled via settings page. See here for more details: https://www.inboundnow.com/translate-inbound-now/
I messed up a link earlier that mentioned how to upgrade to Inbound Pro. The way this suite is setup is that translations only work for Inbound Pro. It’s a better suite than having the stand alone plugins. It’s also free to use. Unused components can be disabled so the load isn’t greater than what you’d want by just having the stand alone plugins installed. https://www.inboundnow.com/upgrade/
Once you have Inbound Pro installed you can enable translations by going to wp-admin->Inbound Pro->Settings and finding the ‘Translations’ section and manually enabling them.