Reading speed is the maximum rate at which subtitle text can be presented and still be comfortably read by the audience, usually measured in characters per second. In subtitle production, it is a core quality parameter that guides line breaks, display duration, and how much translated dialogue must be condensed; different platforms, content types, and viewer profiles often require different limits.
Reading-speed checks occur in subtitle QC and review after translation, often enforced by the client's subtitling convention or QA tool. Translators and editors shorten or rephrase lines that exceed the limit, using editing features that display characters per second and warning flags for out-of-range events, especially for fast dialogue or content aimed at younger or non-native viewers.
A common error is ignoring reading-speed limits during translation and only checking them later. This leads to subtitles that are grammatically complete but too dense; compression done at the last minute may distort meaning or tone, and automated truncation can cut off important information or create abrupt, unreadable line breaks.
For creative and consumer content the failure mode is flatness, not inaccuracy — and flatness passes an accuracy check. Terms here also carry technical constraints (reading speed, character budgets) that are part of the brief.
Angel Translation locks terms like this into a project terminology base before expert review begins, so the same source term resolves to the same target term across every document in a submission — and stays consistent in the next revision. See the 8-step AI + expert workflow.
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