Godfrey Njoroge · · 2 min read
Why Your Training Videos Need Swahili Subtitles, Not Just English Captions
Contents
English captions on a training video check an accessibility box, but they don't necessarily reach the learners a course is actually meant to serve.
If a meaningful share of your learners are more comfortable in Swahili than in English, English-only captions solve the wrong problem.
Key takeaways
- Industry research consistently finds most learners prefer content in their native language, with real completion-rate gaps for non-localized material.
- Subtitles are usually the right first investment for training content; a full dub earns its cost for dense, technical, or safety-critical material.
- The same human-review standard applies to training content as to anything else worth getting right.
What the research actually shows
Industry research on e-learning consistently finds that a large majority of learners - commonly cited around three-quarters - prefer content in their native language, and that localized e-learning material lifts engagement and completion rates substantially compared to non-localized versions, with some studies putting the gap as high as 50%.
Those are broad industry findings, not a Kauli-run study, but the direction is consistent across multiple sources: language match matters more to completion than most course designers assume.
Why this hits harder for training specifically, not just general content
A training video's whole purpose is that the viewer actually retains and applies the material afterward - unlike entertainment content, where a viewer who tunes out for thirty seconds just misses a joke, a learner who tunes out of a compliance or skills module has failed the actual point of the content.
If English is a second or third language for a meaningful share of your workforce or program participants, English-only captions are quietly increasing the number of people who complete a module without absorbing it.
Subtitles vs. a full dub for training content specifically
For most training material, subtitles are usually the right first investment - they're faster and cheaper to produce, and a lot of training content is watched in shared or noisy environments (an office floor, a community hall) where reading along already happens naturally.
A full dub becomes worth the extra cost when the material is dense, technical, or safety-critical - the kind of content where a learner needs to be listening, not splitting attention between reading and watching a demonstration.
Either way, the same accuracy bar applies as anything else worth teaching correctly: a real editor checking the translation against the source before it ships, not just an automated first pass assumed to be good enough.
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