At one point, both leads of The Oath of Love consider long term, career-related stays in Germany. For ML Gu Wei, his medical career will advance with the appointment. For FL Lin Zhi Xiao, a cellist, it's a condition of her signing with a German classical music recording company. Lin Zhi Xiao's senior Shao Jiang is a successful violinist signed to that label, and his agent An Fei, a German woman who learned Chinese to better pursue him, appears in several scenes and has her own mini-arc. I don't remember hearing any German spoken, though.
I am loving your question, because I also find it cool to see how Asian dramas reflect international awareness and cultural exchange.
