# Seeking guidance on building a low-latency AI-powered simultaneous interpretation platform with glossary support

**URL:** <https://discuss.ai.google.dev/t/seeking-guidance-on-building-a-low-latency-ai-powered-simultaneous-interpretation-platform-with-glossary-support/175929>\
**Category:** Gemini API\
**Tags:** live-api, language-translator\
**Created:** [July 23, 2026, 5:55pm UTC](https://discuss.ai.google.dev/t/seeking-guidance-on-building-a-low-latency-ai-powered-simultaneous-interpretation-platform-with-glossary-support/175929 "2026-07-23T17:55:39Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Victor\_Barbieri](https://d1dlmcr85iqnpo.cloudfront.net/user_avatar/discuss.ai.google.dev/victor_barbieri/32/32386_2.png) [@Victor\_Barbieri](https://discuss.ai.google.dev/u/Victor_Barbieri)\
**Post date:** [July 23, 2026, 5:55pm UTC](https://discuss.ai.google.dev/t/seeking-guidance-on-building-a-low-latency-ai-powered-simultaneous-interpretation-platform-with-glossary-support/175929/1 "2026-07-23T17:55:39Z")

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Hi everyone,

We are building a professional real-time interpretation platform for conferences and live events.

Our requirements are:

- Very low latency (simultaneous interpretation)
- Natural and fluent speech output
- One-way real-time speech translation for conference audiences
- Support for a custom glossary (customer-specific terminology)
- Ability to update the glossary per event/session

We initially tested `gemini-3.5-live-translate-preview`, and the translation quality and latency are excellent. However, since it currently doesn’t support system instructions or glossary enforcement, it doesn’t meet our terminology requirements.

We then started testing `gemini-3.1-flash-live-preview` with reasoning and a system prompt containing our glossary. We’re right now experiencing several issues:

- The translation is less fluent than `gemini-3.5-live-translate-preview`.
- The model often waits before speaking instead of translating incrementally.
- We experience pauses and occasional interruptions during long speech.
- Overall, it behaves more like a conversational assistant than a simultaneous interpreter.

Our goal is to build something that behaves like a human interpreter, continuously translating while the speaker is talking.

So we’d like to ask:

1. Is `gemini-3.1-flash-live-preview` the recommended model for this type of application?
2. Are there any best practices for configuring sessions (VAD, buffering, prompting, reasoning, etc.) for simultaneous interpretation?
3. Is there a recommended way to enforce a glossary while maintaining low latency?
4. Is glossary support planned for `gemini-3.5-live-translate-preview`, or is using `gemini-3.1-flash-live-preview` currently the intended approach for this use case?

Any guidance on the recommended architecture or implementation patterns would be greatly appreciated.

Thank you!