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Languages

OneChat detects the language each customer writes in and replies natively — Japanese, English, Korean, Chinese, Thai, Vietnamese, Spanish, French, German and more than 50 others. There is nothing to configure.

How it works​

  • Detection happens per message, so a customer who switches from English to Japanese mid-conversation gets Japanese replies from that point on.
  • Your instructions can be written in one language (say, English or Japanese) — the agent still answers customers in their language while following your policies.
  • Voice notes are transcribed in the language they were spoken and answered in that language.

Controlling language behavior​

You can override the automatic behavior in your instructions if your business needs it:

  • Pin a language: "Always reply in Japanese, regardless of the customer's language."
  • Limit languages: "Reply in Japanese or English only; for other languages, answer in English and mention that support is available in Japanese and English."
  • Fixed phrases: "Always close with 「よろしくお願いいたします。」 when replying in Japanese."

Handoffs across languages​

When a conversation is escalated to Slack, your team sees the original messages. Your team replies in whatever language they're comfortable with — many teams reply in their own language and let customers translate, or use the conversation context to respond directly.