FluencyClock

The hardest languages to learn

Every ranking of this kind is somebody's opinion dressed as a fact. This one uses the current NFATC programme baselines: direct hour totals where the source prints them and transparent weeks×23 derivations for Category I. That is a defensible comparison for its stated learners and endpoint, not a universal difficulty scale.

So what is the hardest language to learn?

The current published data refuses to pick one, and that is the honest answer. Arabic, Cantonese, Japanese, Korean and Mandarin all sit at 2,200 class hours — NFATC does not separate them. Older charts sometimes add a Japanese asterisk, but the current page does not, so model v2 assigns no numerical penalty. Anyone naming a single winner is adding an opinion to the data.

Model v2 class-hour baselines to integrated ILR 3 in speaking and listening, by languageHorizontal bar chart of every language we model, grouped into the four current NFATC difficulty categories. Category I's 552 and 690 values are derived from listed weeks and the typical 23-hour class week; Categories II to IV print 828, 1,012 and 2,200. The same figures appear in the table below.5526908281,0122,200Similar to EnglishCategory I currentDanish552Dutch552Italian552Norwegian552Portuguese552Romanian552Swedish552French690Spanish690ModerateCategory II current · Category III legacyGerman828Indonesian828Malay828Swahili828HardCategory III current · Category IV legacyCzech1,012Finnish1,012Greek1,012Hebrew1,012Hindi1,012Hungarian1,012Persian1,012Polish1,012Russian1,012Thai1,012Turkish1,012Ukrainian1,012Vietnamese1,012Super-hardCategory IV current · Category V legacyArabic2,200Cantonese2,200Japanese2,200Korean2,200Mandarin Chinese2,200
Class hours to reach an integrated ILR 3 in speaking and listening, as published or transparently derived from the current NFATC page. Darker bars have a full write-up; the rest are in the calculator. Category I is a range, not a single plateau.
LanguageFSI hoursBand
Arabic2200super hard
Cantonese2200super hard
Japanese2200super hard
Korean2200super hard
Mandarin Chinese2200super hard
Czech1012hard
Finnish1012hard
Greek1012hard
Hebrew1012hard
Hindi1012hard
Hungarian1012hard
Persian1012hard
Polish1012hard
Russian1012hard
Thai1012hard
Turkish1012hard
Ukrainian1012hard
Vietnamese1012hard
German828moderate
Indonesian828moderate
Malay828moderate
Swahili828moderate
French690similar
Spanish690similar
Danish552similar
Dutch552similar
Italian552similar
Norwegian552similar
Portuguese552similar
Romanian552similar
Swedish552similar

Linked languages have a full write-up of where the hours actually go. The rest are in the calculator.

The bands, and what they mean

BandCurrentLegacy labelHours
similarCategory ICategory I552–690
moderateCategory IICategory III828
hardCategory IIICategory IV1,012
super hardCategory IVCategory V2,200

This ranking is not yours

The current NFATC categories are programme benchmarks for English-speaking students. If you already speak a second language, our model changes the estimate — sometimes substantially. Those discounts are our explicit estimates, not measurements contained in the NFATC table.

The study method matters more than the ranking does. Thirty minutes a day on an app puts the easiest language on this list at over five years, which is longer than the hardest language takes with a tutor and real hours.

Recompute this for your own situation

Common questions

Hardest for whom?
For English-speaking NFATC students studying full time. The current endpoint is an integrated ILR 3 in speaking and listening, not a universal definition of fluency. The ranking would look completely different for a Japanese speaker, for whom Korean is far easier than Spanish. Difficulty is a relationship between two languages, not a property of one.
Does hardest mean impossible?
No, and the framing does more harm than the hours do. Mandarin at an explicit 2,200 class hours is about 3.2 times Spanish’s derived 690, not out of reach. This model also applies a conservative app-only ceiling at B1; that ceiling is a disclosed planning judgement, not an NFATC finding.
Why do some lists say five categories and others say four?
The State Department currently publishes four categories, with Category IV as the super-hard group. Older and community tables commonly use five and often carry the older 600 / 900 / 1,100 hour values. Those are not interchangeable with the current NFATC target and timelines, so this site labels the five-category form as legacy instead of pretending only the Roman numeral changed.
Is Arabic or Mandarin the hardest?
NFATC gives them the same figure — 2,200 class hours — so the current published data does not separate them. Model v2 keeps that tie and adds no hidden ordering.

Once you have picked one

The hours tell you what a language costs. They do not tell you how to spend them, and the method you choose moves the total by more than the gap between two neighbouring difficulty bands.

  • Run your own numbers — target level, method and languages you already speak, which between them change the answer by a factor of three.
  • What to actually study with — every option we track, including the two that cost nothing and earn us nothing.
  • Head-to-head comparisons — ten pairings people genuinely weigh against each other, each with a case for picking neither.

Hours are current NFATC programme baselines: explicit for Categories II–IV and transparently derived from the published Category I weeks. How we adjust them for the level you want and the way you actually study.