Drama translates reasonably. Action translates almost perfectly. Comedy frequently does not travel at all, and the failure modes are consistent enough to describe.
Timing is language-specific
The most fundamental obstacle.
A joke depends on information arriving in a particular order at a particular speed, with the punchline last.
Languages differ in word order, and the element that must come last for a joke to work may be structurally required to come earlier in another language.
Which means the joke cannot simply be translated. It has to be rebuilt so that the surprise lands in the right position, and sometimes there is no arrangement that achieves it.
Subtitles compound this, since a reader receives the whole line at once rather than word by word, and the punchline is visible before it is spoken.
Wordplay is generally unsalvageable
The obvious category, and the standard response is instructive.
Skilled translators do not attempt a literal rendering. They construct a different joke, in the target language, at the same moment, doing the same job.
That is closer to writing than to translating and it is why comedy translation is a specialism.
The results are frequently better than the alternative and they are not the original, which produces the recurring situation where audiences in two countries have different favourite lines from the same film.
Reference density is the bigger problem
Underestimated and more damaging than wordplay.
A great deal of comedy depends on shared knowledge — public figures, advertisements, television, regional stereotypes, historical events, brands.
None of that transfers, and a reference that is instantly legible to one audience is silence to another.
Substituting a local equivalent works and changes the texture, which is why some translated comedy feels oddly domesticated.
And some works are so reference-dense that they are effectively untranslatable, which is why certain celebrated comedies are almost unknown outside their home market.
What travels well
Worth identifying, because it explains which comedies become international.
Physical comedy, which requires no language at all and which is why the earliest international film comedy was silent.
Situational comedy built on universal predicaments — family, work, embarrassment, incompetence, social hierarchy.
Character comedy, where the humour is in a consistent personality rather than in individual lines.
And absurdity, which depends less on shared reference than on shared logic.
The comedies that succeed internationally are overwhelmingly from these categories, which is a selection effect rather than a statement about quality.
The norms differ, which is the hardest part
The obstacle that is not technical at all.
What is acceptable to joke about varies enormously between cultures, and the variation is not predictable from any general principle.
Subjects that are ordinary comic material in one place are genuinely offensive in another, and the reverse.
Directness varies. Some comic traditions are built on understatement and implication, others on explicitness, and material calibrated for one reads as either baffling or crude in the other.
And the relationship between comedian and audience differs — whether the performer is above the audience, among them, or beneath them is a cultural convention rather than a universal.
The dubbing problem specifically
Where comedy suffers more than any other genre.
Comic delivery depends on precise timing, and lip synchronisation constrains the timing available.
A pause that is essential to a joke may not fit, and a line that must be fast may need to be slow.
Which is why dubbed comedy is frequently the weakest category of dubbed content, and why comedy is the genre where subtitle preference is strongest even among people who otherwise prefer dubbing.
What this means for watching foreign comedy
Some practical conclusions.
Not laughing does not mean it is not funny. It frequently means the reference did not land, and reading about the context afterwards can be genuinely revealing.
Physical and character-driven comedy is the accessible entry point to any national tradition.
And a subtitle that seems oddly worded is frequently a translator's reconstruction rather than an error, which is worth some charity given that the alternative was a joke that did not exist.
The translator's credit
Worth a note since the work is substantial and largely invisible.
Comedy translation requires writing ability in the target language, cultural fluency in both, and the confidence to depart from the source when the source cannot be carried across.
It is generally paid at standard translation rates, which do not reflect that it is closer to co-writing.
And the translator is rarely credited prominently, which means audiences attribute a rendering that works to the original writer and a rendering that fails to the translator.
That asymmetry is unfair in both directions and is one reason the best people in the field frequently move to other work.
Regional comedy within one language
The same problem operates at smaller scale and is easier to observe.
Comedy from one region of a country frequently fails elsewhere in the same country, despite a shared language, because the references and the rhythms are local.
Which demonstrates that language is not the whole barrier. Shared knowledge is, and shared knowledge is considerably more local than a national border.