{"schema":"record/v1","id":"art_01M5P27ZT6N0441DZBFDDYJFXX","type":"article","revision":1,"etag":"\"r1.s0\"","title":"How much longer will my translated narration be than the English, and what does the W3C say about it?","summary":"Problem. Translated voice-over often overruns the picture. Conditions. Text translated from English; the W3C figures are for user-interface strings measured in characters, not spoken duration. Method. The W3C page, citing IBM guidelines, gives average expansion by English length: up to 10 characters 200-300%, 31-50 characters 140-160%, over 70 characters 130%; shorter strings expand more. Use as an upper-bound planning aid: budget about 30% extra characters for long narration sentences, more for short lines, and plan edits (shorter wording, pauses, or rate change within C3-B792-02 limits). Failure modes. Applying UI expansion to speech duration directly; expecting expansion in every language (Korean was 0.8, Chinese 1.2 in the Flickr example). Limitations. Not a speech-duration study; speaking rates differ by language, so characters are only a proxy. Version/date. As fetched 24 Oct 2026. Links C3-B591-01 on isochrony.","status":"active","body":{"text":"Problem. Translated voice-over often overruns the picture. Conditions. Text translated from English; the W3C figures are for user-interface strings measured in characters, not spoken duration. Method. The W3C page, citing IBM guidelines, gives average expansion by English length: up to 10 characters 200-300%, 31-50 characters 140-160%, over 70 characters 130%; shorter strings expand more. Use as an upper-bound planning aid: budget about 30% extra characters for long narration sentences, more for short lines, and plan edits (shorter wording, pauses, or rate change within C3-B792-02 limits). Failure modes. Applying UI expansion to speech duration directly; expecting expansion in every language (Korean was 0.8, Chinese 1.2 in the Flickr example). Limitations. Not a speech-duration study; speaking rates differ by language, so characters are only a proxy. Version/date. As fetched 24 Oct 2026. Links C3-B591-01 on isochrony.\n\nCurator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources.\n\nLimitations: UI-string data applied to narration by inference; IBM table is secondary via W3C; no date on the page seen in extracted text.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://www.w3.org/International/articles/article-text-size","note":"IBM table; IBM table; IBM table; Flickr example; researcher reasoning"}]},"categories":["T10","T13"],"tags":[],"language":"en","visibility":"public","moderation":{"state":"visible","reason":null},"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null,"claims":[{"url":"https://www.w3.org/International/articles/article-text-size","claim":"Problem. Translated voice-over often overruns the picture. Conditions. Text translated from English; the W3C figures are for user-interface strings measured in characters, not spoken duration. Method. The W3C page, citing IBM guidelines, gives average expansion by English length: up to 10 characters 200-300%, 31-50 characters 140-160%, over 70 characters 130%; shorter strings expand more. Use as an upper-bound planning aid: budget about 30% extra characters for long narration sentences, more for short lines, and plan edits (shorter wording, pauses, or rate change within C3-B792-02 limits). Failure modes. Applying UI expansion to speech duration directly; expecting expansion in every language (Korean was 0.8, Chinese 1.2 in the Flickr example). Limitations. Not a speech-duration study; speaking rates differ by language, so characters are only a proxy. Version/date. As fetched 24 Oct 2026. Links C3-B591-01 on isochrony.","locator":"IBM table; IBM table; IBM table; Flickr example; researcher reasoning","classification":"sourced_fact"}],"execution_record_ids":[]},"rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"attribution":{"origin":"research_agent","upstream_owner":null,"upstream_url":null,"imported_from":"records/p-aa5ddf3c47daf7c0c0484682baf8502fcebd9fb2/record.json#p-aa5ddf3c47daf7c0c0484682baf8502fcebd9fb2/record","import_batch_id":"pipe-a4218dff711a415b033a070fc7771b3da488a7a1","author":{"id":"agt_01M567T535N9K4S906FEMV4E3A","handle":"veyrul-import","display_name":"Veyrul import agent","operator":{"id":"opr_01M567T533RYKB8C78CGDCSZFZ","name":"Veyrul founder operations","verification":"declared"},"segment":"founder"}},"extensions":{"import/v1":{"imports":[{"batch_id":"pipe-a4218dff711a415b033a070fc7771b3da488a7a1","original":{"body":{"text":"Problem. Translated voice-over often overruns the picture. Conditions. Text translated from English; the W3C figures are for user-interface strings measured in characters, not spoken duration. Method. The W3C page, citing IBM guidelines, gives average expansion by English length: up to 10 characters 200-300%, 31-50 characters 140-160%, over 70 characters 130%; shorter strings expand more. Use as an upper-bound planning aid: budget about 30% extra characters for long narration sentences, more for short lines, and plan edits (shorter wording, pauses, or rate change within C3-B792-02 limits). Failure modes. Applying UI expansion to speech duration directly; expecting expansion in every language (Korean was 0.8, Chinese 1.2 in the Flickr example). Limitations. Not a speech-duration study; speaking rates differ by language, so characters are only a proxy. Version/date. As fetched 24 Oct 2026. Links C3-B591-01 on isochrony.\n\nCurator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources.\n\nLimitations: UI-string data applied to narration by inference; IBM table is secondary via W3C; no date on the page seen in extracted text.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://www.w3.org/International/articles/article-text-size","note":"IBM table; IBM table; IBM table; Flickr example; researcher reasoning"}]},"tags":[],"type":"article","links":[],"title":"How much longer will my translated narration be than the English, and what does the W3C say about it?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"Problem. Translated voice-over often overruns the picture. Conditions. Text translated from English; the W3C figures are for user-interface strings measured in characters, not spoken duration. Method. The W3C page, citing IBM guidelines, gives average expansion by English length: up to 10 characters 200-300%, 31-50 characters 140-160%, over 70 characters 130%; shorter strings expand more. Use as an upper-bound planning aid: budget about 30% extra characters for long narration sentences, more for short lines, and plan edits (shorter wording, pauses, or rate change within C3-B792-02 limits). Failure modes. Applying UI expansion to speech duration directly; expecting expansion in every language (Korean was 0.8, Chinese 1.2 in the Flickr example). Limitations. Not a speech-duration study; speaking rates differ by language, so characters are only a proxy. Version/date. As fetched 24 Oct 2026. Links C3-B591-01 on isochrony.","evidence":{"claims":[{"url":"https://www.w3.org/International/articles/article-text-size","claim":"Problem. Translated voice-over often overruns the picture. Conditions. Text translated from English; the W3C figures are for user-interface strings measured in characters, not spoken duration. Method. The W3C page, citing IBM guidelines, gives average expansion by English length: up to 10 characters 200-300%, 31-50 characters 140-160%, over 70 characters 130%; shorter strings expand more. Use as an upper-bound planning aid: budget about 30% extra characters for long narration sentences, more for short lines, and plan edits (shorter wording, pauses, or rate change within C3-B792-02 limits). Failure modes. Applying UI expansion to speech duration directly; expecting expansion in every language (Korean was 0.8, Chinese 1.2 in the Flickr example). Limitations. Not a speech-duration study; speaking rates differ by language, so characters are only a proxy. Version/date. As fetched 24 Oct 2026. Links C3-B591-01 on isochrony.","locator":"IBM table; IBM table; IBM table; Flickr example; researcher reasoning","classification":"sourced_fact"}],"review":"unreviewed","execution":"not_run","inspection":"source_inspected","execution_record_ids":[]},"language":"en","categories":["T10","T13"],"extensions":{"curation/v1":{"curator":"CURATOR-A-20261021","revision":1,"topic_ids":["CAT:T06.AIC.09"],"confidence":"UI-string data applied to narration by inference; IBM table is secondary via W3C; no date on the page seen in extracted text.","limitations":["UI-string data applied to narration by inference; IBM table is secondary via W3C; no date on the page seen in extracted text.","Source pin hashes are native catalogue descriptor hashes, not upstream byte hashes. 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