When manga and anime are released overseas, localization involves more than simply replacing Japanese words with words in another language. Translators also have to decide how to handle relationships, cultural references, and other information that is built into the Japanese itself.
For example, a character may say “Tanaka-senpai” in Japanese, while the English subtitles simply say “Tanaka.” The basic meaning may still be correct, but part of the relationship between the two characters has disappeared. The word senpai tells a Japanese viewer something about status and distance between them.
The same problem appears with words such as ore, boku, and watashi, which all mean “I” but can suggest different personalities or social positions. Honorific language, dialects, and wordplay may also have no exact equivalent in another language.
Localizers therefore have to decide what to keep and what to change. Words such as senpai or -san may be left in Japanese, or they may be replaced with something that sounds more natural in the target language. Japanese food, school culture, jokes, and other references create similar choices. Keep too much and the audience may not understand it. Change too much and the work may start to feel different from the original.
Subtitles have another limitation: viewers need enough time to read them, so long lines often have to be shortened. Dubbing has different problems, because the dialogue also needs to fit the timing of the scene and, to some extent, the characters’ mouth movements. This is why the subtitles and dubbed dialogue for the same anime may not match exactly.
Manga has its own difficulties. A translated sentence may become too long for the original speech bubble, and sound effects may need to be translated, redrawn, or left in Japanese.
There are also matters outside the translation itself. When a work is released internationally, regional distribution rights and local age-rating systems can affect how and where it is made available.
None of this is unique to Japanese media. Japanese viewers face the same problem when watching foreign films with Japanese subtitles or dubbing. American films may be relatively easy to follow because Japanese audiences are already familiar with many of their settings and conventions. A film from a culture they know very little about can be much harder to understand, even when every line has been translated.
Words can be translated, but an entire culture cannot be squeezed into subtitles. Localization works within that limit, trying to preserve as much of the meaning and atmosphere of the original as possible while making it work for an audience in another language.
