Terminology·9 min read·By Angel Translation Corp.·Updated Nov 2026

Japanese to Chinese Technical Files: What to Leave Unchanged

Japanese to Chinese technical files: separate protected identifiers from reader-facing text, record decisions and compare a published semiconductor case.

View the file review example ↓
Who this is forJapanese-to-Chinese project owners and technical reviewers preparing a documented translation brief.

Separate Japanese labels from protected identifiers

A Japanese file can contain text to translate and identifiers to preserve on the same line. Define these separately before drafting the Chinese version. A protected code is not a reason to leave the surrounding explanation untranslated.

From reading to a project

Separate Japanese labels from protected identifiers

Illustrative review sheet

Japanese identifier register · made-up example

Source label and identifier
文書番号:JP-DEMO-01
Chinese draft · for review
文件编号:JP-DEMO-01
Protected item
JP-DEMO-01 · match the source character for character
Owner decision
Confirm the Chinese label, identifier rule and where the rule applies

Review status: questions to confirm

Self-created identifier example, not a Torex document or an approved product label. The project owner confirms protected items and Chinese terminology.
  1. Classify each item

    Separate model codes and identifiers from Japanese headings, descriptions and instructions.

  2. Keep a reason and an owner

    Record why an item is protected, the required spelling and who can approve a change.

  3. Check both text and references

    Compare protected items across the Chinese file set without omitting the surrounding reader-facing translation.

Related published experience

Torex Semiconductor

Japanese → Chinese

Japanese-to-Chinese documentation for a listed Japanese semiconductor manufacturer.

The Torex project records Japanese-to-Chinese semiconductor documentation in 2011. It does not identify the illustrated code or establish software or datasheet delivery.

For your quotation

Send the source edition and actual source language, protected model codes or identifiers, approved Chinese names and any existing exception list. Mark where each rule applies and who can approve it; confirm the Chinese script, review scope, return files and deadline.

The errors a DNT list prevents

Ask a translator to translate everything and they will — including the things that were never meant to move. A product name gets localized into a common noun. A regulated substance identifier gets "helpfully" rendered. A UI string that matches a hard-coded value in the software gets translated, and the button stops working.

None of these are translation-quality failures; they are scope failures. And scope is set before anyone starts translating — by review, the error is already in the product. Most teams discover they needed a do-not-translate list only after the first incident.

The difficulty is not listing the categories — it is the nuance inside each

"What should not be translated" sounds like a simple question. What makes it hard is the exceptions inside every category.

Brand and product names. Seemingly the most obvious to keep, actually the most market-dependent — some names are transliterated by convention in scripts like Chinese or Japanese, and some must be changed entirely because the original means something unfortunate locally. "Do not translate" and "do not adapt" are different instructions, and conflating them produces two kinds of wrong answer.

Regulated identifiers. Model numbers, standard references (ISO 10218, 21 CFR 820), UDI codes are keys, not prose; translating them breaks traceability. The difficulty is the boundary: the same substance name may have to be translated on a label and left alone in a submission field.

Code-coupled strings. This category is one a linguist cannot judge at all — whether a string is compared against a fixed value elsewhere in the software is knowable only from the code side. Identifying it takes cross-functional work, not language skill.

Third-party quotations and legal citations. Often reproduced verbatim, sometimes with a translation supplied alongside rather than in place of the original. Which one applies depends on what governs the document doing the citing.

The exception inside each category“What should not be translated” sounds simple. What makes it hard is that every category has an exception inside it.
CategoryWhy it is on the listThe nuance that breaks a flat rule
Brand and product namesSeemingly the most obvious to keep as-is.Actually the most market-dependent. Some are transliterated by convention in Chinese or Japanese; some must change entirely because the original means something unfortunate locally. “Do not translate” and “do not adapt” are different instructions.
Regulated identifiersModel numbers, standard references (ISO 10218, 21 CFR 820), UDI codes are keys, not prose — translating them breaks traceability.The boundary. The same substance name may have to be translated on a label and left alone in a submission field.
Code-coupled stringsA string compared against a fixed value elsewhere in the software; translate it and the button stops working.A linguist cannot judge this at all. It is knowable only from the code side — identifying it takes cross-functional work, not language skill.
Third-party quotations and legal citationsOften reproduced verbatim.Sometimes a translation is supplied alongside the original rather than in place of it. Which applies depends on what governs the document doing the citing.

None of these are translation-quality failures; they are scope failures. Scope is set before anyone starts translating — by review, the error is already in the product.

A list that holds up is not the same as a list that got written

The DNT lists we review fail for the same handful of reasons. A list that exists only in an email or a briefing document depends on every linguist remembering to consult it — someone always misses it. An entry that says only "keep in English" means nothing to the next person and gets deleted in a future cleanup as unexplained legacy. Product names change and new regulated terms appear, so a list that was right at launch and never touched since ends up doing two things at once a year later — protecting terms that no longer exist, and missing the ones that now matter. And code-coupled strings are not something a language team can judge on its own; that category is knowable only from the code side.

Agree the protected-term list, its owner, the reason for each entry and the review process in the project brief. Confirm separately whether the file format and tools support automated checks; code-coupled items need the relevant engineering owner’s input.

For Chinese company and product names, use the names and protected-terms register to distinguish approved names from provisional translations.

Four ways a DNT list diesThe lists we review fail for the same handful of reasons — none of which is that the list was wrong when it was written.
FailureWhat happensWhat we do instead
It lives in an email or a briefing docIt depends on every linguist remembering to consult it. Someone always misses it.Agree the list, its owner and review process; confirm separately whether the format and tools support automated checks.
Entries say only “keep in English”It means nothing to the next person, and gets deleted in a future cleanup as unexplained legacy.Every entry carries a reason and an owner.
Written at launch, never touchedA year later it does two wrong things at once — protecting terms that no longer exist, and missing the ones that now matter.Reviewed on a cycle tied to product and regulatory changes.
The language team decides it aloneCode-coupled strings are invisible from the language side, so they are simply not on the list.Ask the relevant engineering owner to identify code-coupled items and confirm the handling rule.

Questions

Should every Japanese product term stay unchanged in Chinese?
No. Separate protected identifiers from reader-facing names and explanations. Confirm approved Chinese names, the reason for each protected item and who can authorize an exception. Do not treat the entire document as a do-not-translate list.
Is a do-not-translate list the same as a glossary?
No. A glossary says how to translate a term; a DNT list says not to translate it at all. They live together but do different jobs — and confusing them leads to approved terms being locked, or protected strings being "translated" as if they were ordinary vocabulary.
Should product names always be kept in the source language?
Usually, but not automatically. Transliteration is expected in some scripts, and occasionally a name is changed because it reads badly locally. That judgement has to be made per market and recorded — otherwise each linguist guesses.
Who is responsible for flagging code-coupled strings?
Engineering. A linguist has no way to know a string is compared against a fixed value elsewhere in the software. This is the most common source of "the translation broke the build" incidents and is best identified with engineering input and verified in the build. If you already have a list, whether engineering helped compile it tells you whether this category is covered.

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Have files for Chinese readers?

Send a representative file, the language direction and the Chinese return you need. We will confirm the document scope, review requirements and quotation with you.