The most challenging language from the top 10 hardest languages to learn for an English speaker is Arabic. It has an entirely foreign alphabet.
Arabic is usually considered one of the most difficult languages to learn, topped by only a few languages like Japanese in terms of difficulty. Plus, it's even harder (or so they say) if you are a native speaker of English or a romance language.
Across multiple sources, Mandarin Chinese is the number one language listed as the most challenging to learn. The Defense Language Institute Foreign Language Center puts Mandarin in Category IV, which is the list of the most difficult languages to learn for English speakers.
Although the script of the two languages is very foreign to western languages, Mandarin Chinese is significantly harder than the Arabic writing system due to the complexity and multitude of its characters.
The language is written from right to left. This is difficult both conceptually and technologically — most computer systems were developed for left-to-right languages like English. Letters change shape based on whether they're in the beginning, the middle, or the end of a word.
While many people find Arabic a bit challenging, tricky, and far more complicated than the English language. Arabic grammar is actually simpler than many other languages, which makes it easier to learn and memorize.
Japanese is another most difficult language for all those who have grown up learning English, Spanish or French but at the same time might be easy for those who are well-versed in East Asian languages.
Arabian can be considered as the 11th oldest language or maybe the 10th oldest language in the world. The older version of Arabic can be traced back to the 10th century making it one of the oldest languages in the world.
Spanish may be the #1 easiest language to learn. Not only does Spanish share the same alphabet – with the sole addition of ñ – but it's also phonetic. That makes figuring out new vocabulary easy, since the spelling tells you how to pronounce it.
Greek is a relatively difficult language to master, even more so for English speakers. But it's still easier to learn than Russian or Arabic. The reason many English speakers find Greek to be so difficult is that it's not closely related to the English language.
Of course, without doubt, Maghrebi Arabic is the hardest. Their dialect is totally different from MSA because their way of pronouncing words is totally different and a little difficult, and also because they are using a lot of French words in their conversation.
According to FSI, the Foreign Service Institute, Vietnamese is categorized as Category IV of languages. The difficulty is just below learning Arabic, Korean, and Mandarin Chinese. It normally takes 44 weeks or 1100 class hours to reach fluency.
As far as trouble learning, Arabic is more difficult than Russian. It has a few distinct lingos, so learning one doesn't imply that everybody will understand you. (In the first place, you need to learn MSA then pick a lingo you need to learn.)
Once you get your head around that, as an Arabic speaker you will find Japanese grammar quite easy. It is highly regular like Arabic, but much simpler: there are no plurals (and certainly no duals!), hardly any conjugations, very limited tenses, no genders, no articles, no cases.
Lojban (pronounced [ˈloʒban] ( listen)) is a logical, constructed, human language created by the Logical Language Group which aims to be syntactically unambiguous. It succeeds the Loglan project.
Is it really the hardest language? As we've seen, then, English is pretty challenging. But it's not the only contender for the World's Most Difficult Language. Other notoriously tricky languages include Finnish, Russian, Japanese and Mandarin.