YouTube Auto-Translate Captions Wrong or Nonsense? Fix

Quick answer: Auto-translate is a sticky setting — once you turn it on for one video it stays on for every video afterwards, silently translating things that did not need translating. That is the cause of most "why are my captions nonsense" cases. Turn it off in the player's caption settings. The deeper problem, when translation genuinely is needed, is that it translates the automatic captions, so any recognition error gets translated too.

First: turn the sticky setting off

Open the gear icon in the player, go to Subtitles/CC, and look for the auto-translate option. If a target language is set, clear it or select the original track. The setting persists across videos and sessions, which is why people find captions behaving oddly days after they last thought about it.

Symptom that confirms this diagnosis: the captions are in your language, but phrased strangely, on a video that was already in your language. It was translated out and back.

Why auto-translated captions read badly

The translation is applied to the automatic caption track, not to a human transcript. So you get two layers of error stacked:

• Recognition errors come first. Names, technical terms, acronyms and anything said over background noise are frequently wrong before translation begins.
• Then those errors get translated literally. A misheard word becomes a confidently translated wrong word, which is harder to spot than the original mistake would have been.
• No punctuation to work from. Automatic captions have weak sentence boundaries, and translation quality depends heavily on sentence structure.
• Idioms and jargon go literal. Domain terms in particular come out as their dictionary meanings.

The practical consequence: treat auto-translated captions as a rough guide to the topic, not as a source for quotes, numbers or anything you would act on.

When the original track is better than the translation

If you have any reading ability in the source language, the original automatic captions are usually more reliable than the translation, because you are only dealing with one layer of error instead of two. Switch tracks in the caption settings rather than accepting the translated default.

If a creator provided a real subtitle track

Some videos have manually written captions or professionally translated subtitles alongside the automatic ones. Where they exist they are far better, and the caption menu lets you choose. A track labelled with a language name rather than "auto-generated" is the one you want.

Getting a summary in your language instead

There is a better path than reading translated captions: summarize from the original-language transcript and produce the summary in your language. That way the model works from the cleaner source text and does the language change once, as part of understanding the content, rather than translating errors line by line.

YT Summarizer reads the full transcript and returns an overview, key points and takeaways — a free summary every day, then one-time credit packs from $9 with credits that never expire. See also translating and summarizing YouTube videos and summaries coming back in the wrong language.

The limit worth knowing: if the automatic captions are poor in the source language, everything downstream inherits that. No tool recovers words that were never recognised.