The only one was when I spoke to the secretary general of the European Parliament, who explained what a challenge it is. He has 10,000 employees and they move. They go from Strasbourg to Brussels, and it's a huge operation. However, they seem to be successful at it, because they're not working in just two official languages and an additional language, but they're dealing with 28.
On March 20th, 2018. See this statement in context.