Bank Transfer Gateway Changing Name

[Spinu Alexandru]

Greetings guys,
I am trying to change the name of the bank transfer gateway and the transaction ID and it is NOT related to the language. I tried inside the BWT plugin but every time I changed something, I did something wrong.
Can someone guide me to what line I have to modify for the gateway name and the first 3 letters in transaction ID?
Screen Shot 2015-07-21 at 6.22.21 PM.png

THANK YOU!

[Spinu Alexandru]

Also i want to translate the PAID word and i cannot find it in languages.
Screen Shot 2015-07-27 at 2.45.02 PM.png

Any help on that guys?
Thank You!