Just copy and paste into lang.yml file. It will work!
# Default prefix
PREFIX: '&e[OptEco]'
# Display when player request an no-permission command
NO_PERMISSIONS: '&cYou have no permission to require this action.'
# Display when command not found
COMMAND_NOT_FOUND: '&cCommand not found.'
# Display player command while using command in console
FOR_PLAYER: '&cThis command just for player, console cannot use this.'
COMMAND:
VAR_AMOUNT: <amount>
VAR_NOT_A_NUMBER: '&cValue %value% is not a number.'
VAR_PLAYER: <player>
VAR_VALUE_CANNOT_BE_NEGATIVE: '&cThe amount cannot be negative.'
PLAYER_NOT_FOUND: '&cCannot found player %who% in server.'
ADD:
DESCRIPTION: add balance to player
SUCCEEDED: '&aSucceeded add &d%value% %currency% &ainto &d%who% &aaccount.'
FAILED: '&cFailed to add &d%value% %currency% &ainto &d%who% &aaccount.'
CHECK:
DESCRIPTION: check player balance
SELF: '&aYour balance now is &d%value% %currency%'
ANOTHER: '&aPlayer %who% balance now is &d%value% %currency%'
ME:
DESCRIPTION: check my balance
PAY:
DESCRIPTION: transfer points to player
PAY_ON_TRANSACTION: '&cYou are on transaction with another player, please using
&d/points [confirm/cancel] &cto confirm your before transaction.'
CONFIRM_DISPLAY: '&aYou have &d%value% seconds &ato confirm, please using &d/points
[confirm/cancel] &ato confirm your transaction.'
OUT_OF_TIME_CONFIRM: '&cYou are out of time to confirm your transaction.'
NOT_ENOUGH: '&cNot enough to pay.'
PAY_CANNOT_SELF_TRANSFER: '&cYou cannot transfer to yourself.'
PAY_TRANSACTION_NOT_EXIST: '&cYou have not paid for everybody.'
ACCEPTED: '&aTransfer &d%value% %currency% &ato &d%who%.'
ACCEPTED_TARGET: '&aYou has been received &d%value% %currency% &aby &d%who%'
FAILED: '&cHaving an error while pending transferred.'
DENY: '&cYou are denied the transaction.'
RELOAD:
DESCRIPTION: reload plugin
DONE: '&aReloaded all config.'
TAKE:
DESCRIPTION: take player points
SUCCESS: '&aTaking &d%value% %currency% &afrom &d%who%'
FAIL: '&aCannot take &d%value% %currency% &afrom &d%who% &abecause of the error!'
SET:
DESCRIPTION: set player points
SUCCESS: '&aSetting &d%value% %currency% &ato &d%who%'
FAIL: '&aCannot set &d%value% %currency% &ato &d%who% &abecause of the error!'
CONFIRM:
DESCRIPTION: confirm transaction
CANCEL:
DESCRIPTION: cancel transaction