Font Fallback字体回退
Font fallback is the mechanism by which an application or system automatically substitutes another font when the primary font does not contain a required glyph. In localization and internationalization documentation, it matters because target scripts such as Arabic, CJK, or Cyrillic often require fallback fonts to display characters correctly instead of rendering missing-glyph boxes, blank spaces, or inconsistent glyphs from unrelated fonts.
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Where this term appears
Font fallback is specified and tested during internationalization, localization testing, and UI development for web, mobile, and embedded systems. Testers check fallback chains on menu items, subtitles, product names, and user-generated content to ensure missing glyphs are replaced by readable fonts instead of producing broken display or layout shifts across platforms.
Translation checks
A frequent issue is assuming the primary font covers all target characters, so localization testers miss fallback gaps until after release. When fallback is not defined, text may display as tofu boxes, use a visually inconsistent mixed-script font, or shift layout, hurting readability and user trust in the localized product.
Keep the term aligned across your files
Creative and consumer content needs accurate meaning as well as tone and context. Subtitles, interfaces and voice scripts also require checks for timing, character limits and pronunciation.
Provide approved terms and previous translations with the source files. Agree how variants, ambiguous wording and revisions will be reviewed. Terminology maintenance and any termbase handback are confirmed in the project scope. See the 8-step AI + expert workflow.
Related document experience
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Transcription + dubbingEmployee-training video transcription and dubbing.
Read the published project →
Alexander Wang (Shanghai)
English ⇄ ChineseBrand documentation.
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Include the source and target languages, file types, intended use, deadline and any approved termbase. Agree handling before sending sensitive files. Acknowledged in 4 hours, quoted in 24.
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