It depends on your expertise in your preferred language. But generally, Python has much more resources and libraries to conduct NN-based experiments. It's really easy to work using python with TensorFlow to implement any deep neural network-based application. You can alos used PyTorch.
Python is the best one for neural network. It includes a lot of frameworks and libraries to build and infer neural network model, such as: TensorFlow, Pytorch, Keras, Caffe, MXNet, ...
Dear, matlab language is best for implementing neural networks in less language code sentences, because the library of function it contains a lot of function to create the neural networks