Prompting Across Languages
Changing language changes tone, stress and syllable count, not just the words on the screen.
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A new language is a new performance
The same melody with Mandarin and English lyrics changes stress placement, syllable count and breathing points. Translating a Chinese prompt word for word does not give the model the same request. Language changes syllable structure, tone movement and how strongly prompt words weigh in training data.
Three cases
| Case | Writing focus | Typical drift | Check |
|---|---|---|---|
| Chinese prompt, Chinese vocal | Mark tones and phrasing, cap syllables per line | Wrong tone, swallowed finals, rising line ends | Compare tone word by word against the lyric |
| English prompt, English vocal | Mark stress and liaison, split long clauses | Function words stressed, consonant clusters blur | Do keywords land on strong beats |
| Mixed language | Name the lead language and switch points | Lead language swallows the second, accent drifts | Breath and timbre at the switch |
Chinese: tone before timbre
The four Mandarin tones often fight the melodic line. State syllables per line, phrase breaks and rhyme positions, or the model will bend tones to the tune and the word will sound like another. Mark polyphonic characters and neutral tones separately; stacked chorus vocals blur first. Line-by-line lyrics hold their endings better than one pasted block.
English: stress carries intelligibility
English hinges on word and sentence stress. Name the stressed words, avoid three or four consonants in a row, and shorten long clauses; that does more than piling on "clear vocal". Liaison and weak forms sound native but cost clarity in fast passages, so trade by use. Mark pronunciation for names, or the default stress may land on the wrong syllable.
Drift in mixed-language prompts
When Chinese and English are mixed, the model often treats the prompt's main language as the sung language, gives the second language a short window, or carries the first language's accent. Write each language as its own block, mark the switch line and add "second verse in English"; that beats interleaving inside one line. State regional accent separately, or the default may not fit the character. When one line carries two languages, the rhyme must be strict, or delivery needs a native-speaker review, mixing is usually riskier than useful. Split into two monolingual versions, generate each, and join them later. Language tags are not decoration; the wrong one shifts pronunciation strategy for the whole section.
Listen in the library
All tracks from midicn-lib — inline badge is the license tier (C1 commercial / C2 non-commercial / C3 study only).
Along the same line
Sources
- International Phonetic Association, Handbook of the IPA 与 Journal of Singing 中关于声调、词重音与连读的章节。
- 普通话声调与歌词写作的公开教学资料。
- 生成服务公开的多语言支持说明，关于语言标签与地区口音。