This comes up constantly when you study a language: you looked up every word, the meanings are all correct, but the sentence as a whole still does not make sense. Usually the reason is sentence structure, a set phrase, the situation it belongs to, or word order — none of which a dictionary lookup solves. Aelano's sentence explanation has AI break the line into chunks and walk you through them: what each chunk means, what each chunk does in the sentence, where this way of saying it usually comes up, and what similar expressions exist.
This helps when:
In the study player, when you hit a line you did not understand you can:
The panel slides up from the bottom and shows the full breakdown of that line.
A full explanation contains these parts:
The whole line as it was said.
One or two sentences telling you what the line is actually saying — not a word-for-word translation, but a plain-language version that captures the core meaning.
Where this way of speaking usually appears. For example, the same line may be used differently in contexts such as "paying at a store," "making dinner plans with friends," or "reporting at work."
The sentence is split into several chunks, and each one is explained on its own:
Rather than a bare subject-verb-object grammar analysis, Aelano puts it in everyday terms — "this chunk sets up the background," "this chunk links what comes before and after" — because the point is for you to understand what you hear, not to pass a grammar test.
The set phrases, idiomatic wording, and natural usage in the line that are worth remembering.
Comparable ways of saying it, so one line teaches you more than one pattern.
A finer grammatical layer: the part of speech of each word, and the phrase structures in the sentence. If you do not care about grammar analysis, you can skip this part; if you are studying grammar, it lets you see how a grammar point actually behaves in a real sentence.
Still have questions after the explanation? You can keep asking the AI — things like "why is there no the here?", "could this be said another way?", "would people really say this in everyday conversation?" The AI answers with the context of that line in mind.
Aelano adjusts how complex the language of an AI explanation is according to the level you set:
You set this level under Settings → Language Level, and it affects both content recommendations and AI explanations throughout the app.
Are AI explanations slow?
Usually the result comes back within a second or two. Generating an explanation for a line the first time can be slightly slower; after that it appears instantly when you open it again.
Does it need an internet connection?
Yes. AI explanations are generated by a cloud model, so a connection is required.
Is the explanation accurate?
In the vast majority of cases, yes. But AI does get things wrong occasionally, especially with slang, dialect, and technical terms. If an explanation looks off, use a follow-up question to have the AI explain it again, or send us feedback.
How is this different from looking up a word?
You will often use the two together: look up the words you do not know, then have AI explain the line.
Why do some short lines have no "similar expressions" or "key expressions"?
When a sentence is too short or too simple, the AI may skip those sections — there is nothing to generalize from.
Which languages does sentence explanation support?
Aelano's subtitle transcription supports 100+ languages, and sentence explanation covers the main study languages (English, Japanese, Korean, German, French, Spanish, Chinese, Russian, and others). For less common languages, explanations may not be as fine-grained as for the major ones.