SINCE 3.x the plugin will use 1.16.4 api. If you have some issues with the lang file please update to 2.2.1 Version lower than 1.13 will NOT receive any kind of support. Latest plugin version compatible with spigot 1.8 is 2.1.0
Please review and let me know what you think. For ANY issue use THIS. Any issue present in the comment will be ignored.