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Models can often understand and generate many languages, but performance and prompt effects vary by language, task, and model.
Use the language that best expresses the request, specify the desired response language, and verify important translations or facts with fluent speakers or reliable sources.
You can prompt a multilingual model in a language other than English. OpenAI’s current API help says its models are optimized for English but trained on multilingual data and can understand and generate text across languages. That does not mean performance is the same in every language or task. Studies find language effects are not uniform. Behzad, Zeldes, and Schneider tested three models on grammaticality questions about English, prompting in English, German, Korean, Russian, and Ukrainian; prompt language significantly affected results, and non-English prompts sometimes performed better for that specific task. Other multilingual studies report disparities shaped by target language, task, model, and available data. Neither finding supports a universal rule that English prompts are always better or worse. For a practical prompt, state the language of the input and the language and locale expected in the output. Keep names, technical terms, and quoted text intact when they matter. If a task involves translation, ask for alternatives or a note about ambiguity. For high-stakes legal, medical, financial, or public information, check terminology and factual claims with a qualified fluent speaker or authoritative source. When quality is important, create a small test set in the target language and compare outputs against native-speaker judgments. Watch for dialect, script, formality, code-switching, and tokenization issues. Translation through English can help with some tasks but can also introduce errors or lose culturally specific meaning. Treat language choice as an experiment to validate for the actual use case.
Os fluxos de trabalho de idiomas podem avançar mais rapidamente sem sacrificar a consistência.
Ele expande o acesso entre idiomas e estilos de comunicação.
As equipes podem gastar mais tempo julgando enquanto a automação cuida da repetição.
Multilingual models and evaluation sets will continue to expand, but language quality gaps may remain uneven across languages and tasks. Future benchmarks should include native-speaker judgments, dialects, code-switching, and culturally grounded contexts. Product teams should monitor quality by language rather than treating “multilingual” as a single capability. Users should expect both improvements and variation across model versions. More speech and multimodal use will also require evaluation beyond written prompts. Translation quality should be tracked separately from task accuracy across versions.
A user asks for a Spanish response using Mexican Spanish and a professional but approachable tone.
A researcher compares English and Korean prompts for the same grammaticality task with fluent reviewers.
A translator asks the model to flag ambiguous idioms instead of silently choosing one interpretation.
A team tests a support workflow in the exact languages and dialects its customers use.
Fatos alucinados podem entrar silenciosamente em relatórios, fluxos de apoio ou resultados de pesquisas.
A sensibilidade do prompt pode criar resultados inconsistentes em solicitações semelhantes.
Dados de texto confidenciais podem ser expostos se os controles de acesso forem fracos.
Defina o formato de saída, o tom e os padrões de qualidade antes da implementação.
Respostas terrestres com fontes confiáveis sempre que a precisão for importante.
Mantenha um ponto de verificação de revisão humana para resultados de alto risco.
Rastreie padrões de falha e treine novamente prompts ou fluxos de trabalho regularmente.
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Models can often understand and generate many languages, but performance and prompt effects vary by language, task, and model. Use the language that best expresses the request, specify the desired response language, and verify important translations or facts with fluent speakers or reliable sources.
The Help Center states both multilingual capability and English optimization.
The study tested three models and five languages for English grammaticality questions.
These details clarify the language variety and output requirements.
Official guidance and research show capability does not imply parity.
Fluency does not guarantee factual or terminological accuracy.
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