Français
French subtitling breaks in ways generic tools do not anticipate: elision glues words together, guillemets take their own spacing, and a line that ends on an article reads as a mistake even when every character is correct. Hello8 runs a French-specific segmentation engine that knows the difference.
310 million
Native speakers
5 Regions
France, Canada...
≤5% WER
Word Error Rate
Human + AI
Hybrid workflow
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Our segmenter carries a French model of where a subtitle may end. It breaks before conjunctions and connectors (mais, car, donc, pourtant, cependant, néanmoins, toutefois) and before relative pronouns (qui, que, dont, où, lequel), because those start a new clause and the eye expects the break there. It refuses to end a cue on an article, a preposition, a possessive, a subject pronoun, or an elided form such as qu', d', l', n', j'. Those words need what follows them to mean anything, and stranding one at the end of a line is the single most common tell of machine subtitling.
French quotation uses « » with a narrow no-break space inside each guillemet, and the high punctuation marks (: ; ! ?) take a space before them. Straight quotes imported from an English workflow are wrong twice over: wrong glyph, wrong spacing. Our sentence-boundary detection recognises a closing guillemet as part of the sentence end, whether the period sits inside or outside it, so quoted dialogue does not get split mid-quote.
Not every French convention is a mistake worth flagging. Our reviewer classifies guillemet formatting, optional commas, the dropped ne in spoken negation, and typographic spacing as stylistic, and keeps grammar, agreement, and mistranslation as errors. You see the ones that matter first instead of a wall of undifferentiated warnings.
Generic engine
Il a dit qu'il ne viendrait pas parce que le train était en retard.
Hello8
Il a dit qu'il ne viendrait pas parce que le train était en retard.
Breaking after the article le strands it from its noun. The engine breaks before parce instead, a connector it knows about.
Generic engine
"Je ne sais pas", répondit-elle.
Hello8
« Je ne sais pas », répondit-elle.
Straight quotes and missing narrow no-break spaces. The AI Reviewer flags this as stylistic, not as an error, so it never buries a real mistranslation.
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