We show the advantages of using Swift as the programming language for behaviours on the Pepper and Nao robots as used with the RoboCup Standard Platform League and the RoboCup@Home - Social Standard Platform. We show that Swift is not only incorporating modern features of object-oriented programming and functional programming, but is also now a stable systems programming language that enables both high-level development as well as fine hardware control. Deterministic memory management makes Swift suitable for real-time, embedded systems, and thus for robotic applications. Moreover, we show in this paper we can apply model-driven software-development by deploying behaviours coded as executable arrangements of logic-labelled finitestate machines (LLFSMs). We also show LLFSMs are not only suitable for reactive architectures, but also for deliberative architectures.