Why Is Rare-Language Translation So Hard?

Every linguist in a translation company specializes in different languages, so there's no fixed answer to "which language is the hardest in the world?" — it depends on the languages each translator knows best.

Take English: learning it is genuinely difficult, but that difficulty mostly comes from the learner's struggles with certain grammar points, not from English being inherently hard to translate. The languages widely regarded as the hardest to master and translate include:

Mandarin: a tonal language where the same syllable carries different meanings under different tones, with more than 8,000 written characters — one of the hardest languages to master. Arabic: an enormous vocabulary plus significant regional dialect variation that directly affects translation quality. Korean: a grammatical system very different from English, with pronunciation and grammar rules that make it hard to learn and translate. Japanese: a single word may involve subtle variations across thousands of characters. Hungarian: a complex vocabulary system that is hard to grasp.

For translation services, language difficulty is only one variable — what truly determines quality is the linguist's long-term accumulation in that language and the culture behind it.