爱丁堡用什么语言？
苏格兰的官方语言是苏格兰盖尔语，属于凯尔特语族，由于历史上没有良好的文字系统（直到中世纪晚期才发明文字），所以口语得以较好保留；但是书面语在1700年以后才开始使用，并逐渐被英语所替代。
目前，苏格兰盖尔语处于危机状态，年轻人多数不会说盖尔语，也不会读写盖尔文；虽然官方仍承认该语言，并且做出种种努力来挽救这一语言，但效果并不明显。 不过，爱丁堡作为苏格兰最大的城市和首府，其官方语言是英语。另外，因为历史上与苏格兰王国有着密切联系，因此爱丁堡的市政部门有义务在官网上提供翻译成多种语言的指引，包括中文、日文、韩语等。
如果题主指的是爱丁堡大学或爱大校区所在的城市，那么学校官网显示：The University of Edinburgh is a public research university in Edinburgh， Scotland. It was founded in 1583 by royal charter from Queen Elizabeth I and received its current name in 1947. The University operates several campuses throughout the city， with the principal campus located in the George Square area. The university also owns and runs The Royal (Dick) School of Veterinary Medicine on the south side of the city. The university’s mission is to “dive deeply into areas that are interesting and important” – it has five primary objectives： ... To provide high-quality teaching， both within and beyond the traditional boundaries of disciplines ... To conduct cutting-edge research across the full range of sciences and humanities—and where necessary， forge new links between these two equally vital activities ... To train students and teachers to fulfil these dual purposes.