With Anturnia Gamemodes you can change your gamemode in a easy way. The plugin has also custom messages support so you can decide the prefix and translate it into your language.
PREFIX: '&7[&2AnturniaGamemodes&7] '
console: Console has no permissions for this!
gamemodeSurvival: '&fYour gamemode has been changed to &2'
gamemodeCreative: '&fYour gamemode has been changed to &2'
gamemodeAdventure: '&fYour gamemode has been changed to &2'
gamemodeSpectator: '&fYour gamemode has been changed to &2'
checkGamemode: '&fYour gamemode is currently: &2'
nameSurvival: SURVIVAL
nameCreative: CREATIVE
nameAdventure: ADVENTURE
nameSpectator: SPECTATOR
Instalation instruction:
Download the jar file.
Put it into your plugins folder
Start your server
The plugin's folder should be appear which contains the message file
Edit the messages in the message.yml like you want and restart the server