Yes. Several virtual sales agents support both English and Spanish, and some support dozens of languages.

Voice platforms such as Synthflow, Retell AI, and ElevenLabs list Spanish and many other languages for phone conversations.

11x supports multilingual outreach and a voice agent that vendor comparisons say supports 55+ languages.

Support varies by channel and quality, so test each language on live calls before you commit.

Rox's own guide to AI sales agents for outbound calls says English is native on most platforms and that other languages vary in production quality.

Which AI sales agents support English and Spanish?

The table below uses each vendor's published materials where available.

Language counts change often and are marketing claims, so verify each one in a trial.

Two cautions apply to this table. Retell's comparison is published by a competitor of the platforms it ranks, and two sources give different language counts for 11x's voice agent. Treat all counts as claims to test.

What does "supports Spanish" mean?

A vendor can mean any of five different things. Ask which one applies.

Synthflow's documentation notes that the language you select affects both speech recognition and speech output, and recommends its native transcriber for non-English languages.

11x states that its outreach is written from scratch in the target language and not through a translation layer, and that research is sourced locally. Both are vendor statements.

Which channels support multiple languages?

11x notes that WhatsApp dominates in Latin America and parts of Asia while email and phone suit B2B buyers in Europe.

Choose channels by region, not only by language.

How do you test multilingual quality?

Do not rely on a demo in English. Run this test during the pilot.

1. Write 10 realistic scenarios in each target language, including an objection, a pricing question, a request to speak to a human, and an off-script question.

2. Use native speakers to play the prospect and to score the results.

3. Test accents and regions. Mexican, Castilian, and Caribbean Spanish differ in vocabulary and pronunciation.

4. Test line quality. Use mobile calls with background noise.

5. Test switching. Have the prospect change language mid-call.

6. Score each call on accuracy, naturalness, correct terminology, and appropriate formality.

7. Compare to English results on the same scenarios.

8. Set a pass mark before you start, such as no factual errors and a native-speaker rating above a threshold you choose.

One vendor comparison reports that reviewers saw voice agents struggle with accents, turn-taking, and objection handling.

Treat that as a reason to test, not as a verdict on any one product.

What should you check beyond language?

In the US, the FCC confirmed in 2024 that AI-generated voices fall under the TCPA's "artificial or prerecorded voice" rules, which require prior express consent for covered calls.

See voice AI for revenue capture and cold outreach compliance. This is general information, not legal advice.

What does multilingual coverage cost?

Pricing differs by platform, and language is rarely a separate line item. Compare cost per qualified meeting in each language.

• Voice platforms bill per minute. Retell publishes pay-as-you-go pricing, and the rate depends on the voice and model chosen. See voice AI for revenue capture.

• Digital worker platforms such as 11x use monthly subscriptions. Rox's AI sales agent pricing guide reports 11x at roughly $5,000 to $6,000 per agent per month, an approximate figure.

• Non-English voices and models can cost more per minute. Ask the vendor for a language-specific quote.

Which approach fits which team?

Per Rox's low-volume calling guide, senior buyers at named accounts usually warrant a prepared human caller. That holds in any language.

How does Rox fit in?

Rox is a revenue agent platform that decides which accounts to prioritize and drafts outreach from account signals, and it layers on top of calling platforms.

Whether and how Rox supports languages other than English for agent-generated outreach is not documented in the pages I reviewed, so confirm current language support with Rox before describing it to buyers. Results vary by configuration and are not guaranteed.

FAQ

Do any virtual sales agents support both English and Spanish conversations?

Yes. Voice platforms such as Synthflow, Retell AI, and ElevenLabs list Spanish and many other languages. 11x supports multilingual outreach, and Dialpad Ai Sales is noted for Spanish support in Rox's AI sales agents guide. Quality varies, so test in your own accents and scenarios.

Can an AI agent switch between English and Spanish mid-call?

Some can. Synthflow lists a multilingual mode that switches between English, Spanish, and eight other languages, and ElevenLabs describes automatic language detection with mid-conversation switching. Test the switch on real calls.

Is Spanish support as good as English support?

Often not. Rox's AI sales agents guide says most platforms natively support English and that quality in other languages varies and is fast-moving. Verify production-ready quality, not beta.

Are AI sales emails in Spanish translated or written natively?

It depends on the vendor. 11x states that its outreach is written from scratch in the target language. Ask each vendor, and have a native speaker review samples.

What compliance rules apply to AI calls in other countries?

Rules differ by country and include consent, calling hours, disclosure, and data protection. Have counsel review each market before launch.

How many languages do I need?

Start with the languages where you have pipeline or a clear target market. Pilot one language at a time and compare cost per qualified meeting to your English baseline.