crazydaze.6231:

What programming languages can be used to create an addon for GW2?
Can I use LUA?

werdernator.6105:

i have relatively few experiences in lua,
but if it supports json-deserialization and httprequests, that will work.

other popular options are c#, java, node.js or php (all of these are easy-to learn imho)

StevenL.3761:

node.js is not a programming language :/