Propose an alternative architecture to address the variable length input and output requirements of your multilingual chatbot system. Explain the tradeoffs involved in this design decision.

Replace the MLP-based approach with a Recurrent Neural Network (RNN) that can handle variable-length inputs and outputs effectively. This change will allow the system to adapt dynamically to user input sequences of different lengths without requiring preprocessing, but it may introduce additional computational complexity due to recurrent computations.