### Answer To change the transcription STT to British English, set the

language

parameter to

"en-GB"

when creating or updating your voice agent. [(1) ]() [(2) ]() [(3) ]() When creating an agent:

javascript
const agentResponse = await client.agent.create({
  language: "en-GB",
  // ... other agent parameters
}) ;

[(3) ]() When updating an existing agent:

javascript
const agentResponse = await client.agent.update('your_agent_id', {
  language: "en-GB"
}) ;

[(1) ]() The

language

parameter specifies what language and dialect the speech recognition will operate in. [(1) ]() [(2) ]() [(3) ]() Selecting

en-GB

optimizes speech recognition for British English.

​ To learn more, see the sources I considered: [[1] Update Voice Agent](https://docs.retellai.com/api-references/update-agent) [[2] Get Voice Agent](https://docs.retellai.com/api-references/get-agent) [[3] Create Voice Agent](https://docs.retellai.com/api-references/create-agent) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.

### Answer To improve transcription accuracy for UK customers who aren't tech-savvy, try adding

boosted_keywords

to bias the transcriber toward common British terms, brands, or phrases your customers use. [(1) ]()

javascript
const agentResponse = await client.agent.update('your_agent_id', {
  language: "en-GB",
  boosted_keywords: ["retell", "kroger"]
}) ;

Replace the example keywords with terms specific to your use case—common product names, British spellings, regional terms, or frequently mentioned brands. You can also adjust the

stt_mode

parameter, which controls the speech-to-text mode. The available options are

"fast"

(default) or `"accurate"`—switching to

"accurate"

may improve transcription quality at the cost of slightly higher latency.

javascript
const agentResponse = await client.agent.update('your_agent_id', {
  language: "en-GB",
  stt_mode: "accurate",
  boosted_keywords: ["your", "custom", "keywords"]
}) ;

These adjustments should help improve transcription accuracy for your UK customers.

​ To learn more, see the sources I considered: [[1] Create Voice Agent](https://docs.retellai.com/api-references/create-agent) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.