### Answer Yes, the Agent Handbook presets Echo Verification and NATO Phonetic Alphabet are designed to help with spelling accuracy issues [(1) ]() . Echo Verification repeats back names, phone numbers, and other critical details for confirmation. For uncommon names, it spells them out letter by letter . This preset is available for voice agents only . NATO Phonetic Alphabet uses the NATO phonetic alphabet (A as in Alfa, B as in Bravo, etc.) with natural pauses for clarity when spelling is needed . It's useful for confirming email addresses, reference numbers, account IDs, or names over the phone . This preset is also available for voice agents only . Language Support: The Agent Handbook documentation doesn't explicitly state whether these presets work with Spanish and Portuguese spelling . However, Retell AI does support both

es-ES

(Spanish - Spain) ,

es-419

(Spanish - Latin America) ,

pt-PT

(Portuguese - Portugal) , and

pt-BR

(Portuguese - Brazil) as language options [(2) ]() [(3) ]() [(4) ]() [(5) ]() . For the most accurate information about language-specific behavior of these presets, I recommend testing with your target language or reaching out to Retell AI support for confirmation.

​ To learn more, see the sources I considered: [[1] Agent Handbook](https://docs.retellai.com/build/agent-handbook) [[2] List Voice Agents](https://docs.retellai.com/api-references/list-agents) [[3] Create Voice Agent](https://docs.retellai.com/api-references/create-agent) [[4] Update Voice Agent](https://docs.retellai.com/api-references/update-agent) [[5] Get Agent Versions](https://docs.retellai.com/api-references/get-agent-versions) ​

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