Voice AI Agents Struggle With Bilingual Speech, Study Finds

A new study from ServiceNow-AI found that most voice agents struggle to understand people who speak two languages at once (code-switching). The team tested 7 speech recognition systems on Spanish-English, French-English and other language pairs. ElevenLabs Scribe V2 and AssemblyAI Universal-3 Pro delivered the best results, while OpenAI Whisper simply translates bilingual speech instead of transcribing it.

AI-processed from Hugging Face Blog; edited by Hamidun News
Voice AI Agents Struggle With Bilingual Speech, Study Finds
Source: Hugging Face Blog. Collage: Hamidun News.
Listen to article

Voice AI agents handle bilingual customers poorly, according to a study by ServiceNow-AI. The company tested seven popular speech recognition systems on examples of code-switching, where people move smoothly from one language to another within a single utterance.

What is code-switching in speech?

Code-switching is when people move smoothly from one language to another within a single utterance, weaving words and phrases together.

Why do voice AI agents handle bilingualism poorly?

Voice assistants and agents are trained mainly on monolingual data, so they struggle to recognize mixed speech.

Key Questions Answered

What is code-switching in speech?

Code-switching is when people move smoothly from one language to another within a single utterance, weaving words and phrases together.

Why do voice AI agents handle bilingualism poorly?

Voice assistants and agents are trained mainly on monolingual data, so they struggle to recognize mixed speech.

ZK
Zhemal Khamidun — CPO at Alpina Digital, product manager of AlpinaGPT. Building AI products since 2019. Hamidun News is a pet project that grew into a production aggregator with 6,000+ readers.
✦ Unified AI Workspace · Nomad

Test Frontier LLMs & Autonomous Agents in One Workspace

Run Claude Opus 5.5, GPT-6, Gemini 3.1, and DeepSeek side-by-side in Nomad AI (nomadnet.ai) — unified model routing, deep research, and multimodal workflows under one subscription.

Try Nomad AI →Launch Nomad Agent
What do you think?
Loading comments…