Apparently, British diplomats and other embassy staff have found that the second hardest language is Japanese, which will probably come as no surprise to many, but the language that they have found to be the most problematic is Hungarian, which has 35 cases (forms of a nouns according to whether it is subject, object, genitive, etc). This does not mean that Hungarian is the hardest language to learn for everyone, but it causes British diplomatic personnel, who are generally used to learning languages, the most difficulty. However, Tabassaran, a Caucasian language has 48 cases, so it might cause more difficulty if British diplomats had to learn it.