Mandarin
Mandarin is a tonal language, meaning the tone or pitch used when saying a word can change its meaning. For example, when speaking Mandarin, the tone you use when saying “ma” can determine whether you’re saying “mother” or “horse.” While anglophones do use tone in certain instances—such as to indicate when you’re asking a question—English is not a tonal language, making the adjustment to Mandarin challenging for many. But don’t give up just yet—Mandarin is an incredibly popular choice among those learning a second language, and if others can do it, so can you.
Hungarian
Hungarian is a Uralic language, making it distinct from many European tongues that are part of the Indo-European language family. This alone can make the language feel unfamiliar to English speakers, and that’s not even touching the complex pronunciations, accents and idioms one will surely stumble across in their journey to learn Hungarian.
It’s the sixth-most spoken language in the world, but that doesn’t mean it’ll be a walk in the park for new learners. Arabic has a different alphabet, very different grammar rules and even a number of sounds that aren’t used in English. At the end of the day, it might not be the right choice for an easy hobby, but worth it for anyone looking for a rewarding challenge.
Finnish
Any language learner knows that it’s a journey that’s never Finnish-ed (pun very much intended). Of course, if the language you’re trying to pick up is Finnish, your journey may take you longer than anticipated. Like Hungarian, Finnish is a Uralic language, with a case system and rules around verb conjugation that may feel especially tricky for English speakers to master (good news for Estonians, however—you should have no problem picking up this fellow Uralic tongue).
Vietnamese
The good news for those interested in learning Vietnamese is that the vocabulary and grammar are known for being fairly straightforward and logical, with a number of loan words from English. Despite this advantage, a lot of anglophones will likely still struggle with the six tones of the Vietnamese language—for comparison, Mandarin has just four basic tones.
Danish
Many Scandinavian languages are known for being easy fodder for English-speaking language learners, thanks in large part to their Germanic roots. Danish is a notable exception to this rule, largely because of a difficult set of pronunciation rules and the fact that how Danish words are spelled and pronounced is… different, to say the least.
Japanese
One of the difficulties English speakers are likely to face when learning Japanese is the phonetics. There are sounds that exist in Japanese that simply aren’t used in English, as well as differences in how certain letters, such as R, are pronounced. While you’re likely to get tripped up at first, remember that language learning is worth it for your brain—literally, picking up a second language improves your brain function.
Serbian
As with many languages listed here, taking up Serbian will mean learning a new alphabet and adjusting to a slew of grammar rules that might seem positively upside down for an English speaker. Once you can overcome the complex and at times confusing rules of Serbian grammar, however, many language learners find it easier in comparison to other languages on this list, such as Arabic and Japanese.
Thai
About 38 million people worldwide are already speaking Thai, so it must not be too challenging, right? Well, for an English speaker, learning Thai may be easier said than done. Despite having a mostly monosyllabic vocabulary and a healthy number of loan words from English, there are also a number of linguistic differences that can easily trip you up. The Thai language also includes many more pronouns than English, to signify anything from gender to formality to the age difference between you and the person you’re speaking about.
Icelandic
Icelandic and English may both fall into the Indo-European language family, but the two share surprisingly few loan words. One of the biggest draws of learning Icelandic is the fact that it’s believed to be the closest active language to Old Norse, the now-extinct tongue that strongly influenced many existing Scandinavian languages. While this makes for an interesting historical motive to learn the language, it also means that Icelandic has remained preserved and without a lot of overlap with other languages, creating a worthy challenge for language learners.