Multiple sound spot synthesis, which can present different sounds in different zones simultaneously using a loudspeaker array, is an important spatial sound presentation technology for speech and audio applications. We have previously implemented a portable multiple sound spot synthesis system with a compact circular array of 16 loudspeakers, which can be carried out with a suitcase. To further improve the mobility, we implement a very small 16-channel amplifier directly mounted under the compact circular array. Additionally, we implement a system integrating multiple sound spot synthesis and multilingual simultaneous speech-to-speech translation on-premise on a laptop without network connection. Finally, the complete demo system can be carried out with a backpack. In the Show & Tell, we demonstrate four-language sound spot synthesis combined with multilingual simultaneous speech-to-speech translation using the compact demo system.