The English translation was semantically accurate, but the output shifted the casual vlog register toward a slightly more formal tone.
What was measured
Translation Accuracy
Is the translated output semantically correct, and does it preserve technical terms, tone, and meaning?
decisive for this rankingtransformation
A video translator must preserve meaning, tone, and technical terms in the target language; poor translation means the tool does not do the job. (3 of 3 judges)
What was given, what came back
Test input: Hindi vlog-style talking head (Hindi → English) · video · group: video-translation-voice-clone-lip-sync
Input — what we sent
Input not captured
This run recorded no prompt or input file for the test, so we cannot show you what produced the result below. Capture gaps are tracked, not hidden.
A casual Hindi/Hinglish talking-head or vlog-style creator video translated into English to stress informal language handling, slang, and natural-sounding voice cloning on real creator content.
Output — unretouched
Synthesia — Free Copyright Stock Videos Images And Music.publer.com (online-video-cutter.com).mp4
Also checked on this input — same tool, 6 other criteria
Output Quality & Export✗ FailedExport was limited to paid access, so the final result was not freely downloadable as a clean, unrestricted export.Output Quality & Export✗ FailedExport was restricted without a paid plan, so the final video is not freely downloadable in a production-ready way on this test.Output Quality & Export✗ FailedAlthough the avatar output was described as professional-looking, export was restricted to the paid plan or limited trial and there was no reliable free download.Voice Cloning Quality◐ MixedThe generated Hindi voice was clear and natural, but the output used an AI avatar instead of the original person, so it did not preserve the source speaker’s identity or style.Voice Cloning Quality◐ MixedThe dubbed voice was clean and understandable, but it did not fully capture the casual conversational tone of the original vlog speaker.Voice Cloning Quality◐ MixedThe Spanish voice sounded natural and professional, but the report frames the workflow as avatar-based rather than source-speaker-based, so it does not demonstrate true original-speaker voice cloning.
Provenance
- Observation
- efb14767-e1eb-4dfd-ae5c-751c213331e3
- Evidence run
- 9feca581-b454-4bda-a610-a646cd0092f0
- Study
- Translate Videos with Voice Cloning and Lip Sync Using AI
- Research task
- 86b96dfpf
- Tested at
- Jun 24, 2026
- Source
- first-party
- Evidence state
- verified
- Proof shown
- output only
- Cost / latency
- not captured
- Repeat run
- not captured
- Tester
- not captured
The last three rows are honest blanks, not placeholders — our capture has no field for them yet.
Query this
get_evidence({
tool: "synthesia",
scenario: "video-translation-voice-clone-lip-sync"
})MCP · mcp.aidemos.com/api/mcp
Free with attribution.
Same input, same check — 6 other tools
measured on Translation Accuracy
D-ID✓ WorkedCan produce an acceptable English-to-Hindi translation.Dubverse✓ WorkedPreserves common fitness terminology accurately when dubbing English to Hindi.ElevenLabs✓ WorkedProduces an accurate Hindi translation of the English fitness narration, preserving the intended meaning well enough for instructions.Heygen✓ WorkedProduces mostly accurate English→Spanish translation for structured educational narration.Rask AI◐ MixedProduces mostly accurate English translations, but the output can become slightly too formal for casual vlog language.Sync Labs✓ WorkedEnglish→Spanish translation is accurate and clear on structured educational narration.
This evidence is published in
Real inputs and real outputs, no retouching · every cell queryable via API & MCP · aidemos.com