Installation is simple and easy with only a few requirements.
Languagy is a Spigot API for providing player-individual languages for plugins. You can read more about Languagy here.
Download the plugin jar from Spigot and place it in your servers plugin folder. Restart the server.
NEVER use PlugMan, /reload or similar. These methods are extremely unsafe and will break your server / cause unexpected issues. Bug reports will be closed if you are using these plugins and/or reloaded the server. If you must reload plugins, please use the ServerUtils plugin - this is the safest way.
Your server should start without errors. RPGRegions has now generated the files it needs. Configuration can be found in RPGRegions/config.yml. Continue to the configuration section.