Import already existing language files

Hello everyone!

I´m the pluginPlugin A plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. WordPress plugins are written in the PHP programming language and integrate seamlessly with WordPress. These can be free in the Plugin Directory or can be cost-based plugin from a third-party author of “Subscribe to Double-Opt-In Comments“.

My plugin has multiple language packs added before this translation site was established. I´m now searching for a way to import these language packs into the translation process.
I´ve read the documentation, but got no hint about the import process for my case. It only states that existing translations were imported when the switch to this site was made. But it didn´t happen for my translations because there was an error. It is fixed now, but how can I get my translated stringsString A string is a translatable part of the software. A translation consists of a multitude of localized strings. into this process here :-)?

— Tobias