Get started

AI phone agents in Czech

ThunderPhone supports Czech voice calls, a Czech dashboard interface, and a dedicated Czech documentation edition. Czech is one of the platform's 47 supported voice languages, with eight compatible voices in the current catalog.

Czech voice availability and pricing

The current catalog includes eight voices that support Czech, among them two dedicated Czech voices, Jana and Jan.

Czech uses a premium language path at +3¢ per minute on all of its voices. That makes the engine-plus-language rate:

  • Spark: 2¢ + 3¢ = 5¢/minute
  • Bolt: 5¢ + 3¢ = 8¢/minute
  • Storm: 9¢ + 3¢ = 12¢/minute

Billing is pay as you go with no subscription. These illustrative figures exclude telephony and any other optional configuration charges; the agent builder shows the current all-in rate as settings change.

Judge voices against the calls you expect. Test Czech names and declensions, street addresses, numbers, English loanwords, business-specific terminology, and the amount of Czech-English switching your callers actually use.

Czech in the dashboard and documentation

Czech is a shipped dashboard locale. A team can build agents, review calls, and operate the account entirely in the Czech interface.

ThunderPhone also publishes a dedicated Czech documentation edition on its docs site, giving Czech-speaking builders localized product guidance alongside the Czech caller experience.

Czech and English in one call

An agent can start in Czech and switch automatically when a caller moves to a configured additional language such as English—or start in English and switch to Czech.

The chosen voice must support every selected language. Test realistic switching instead of assuming every code-mixed phrase will behave identically, especially when callers alternate languages inside names, addresses, or technical descriptions.

Sample Czech call experience

The following flow is written in English to describe the caller experience.

Agent starts in Czech: Greets the caller, identifies the business, and asks how it can help.

Caller answers in Czech: Says they want to move a dental appointment to next week.

Agent continues in Czech: Confirms the caller's name, looks up the approved scheduling action, and offers two available times.

Caller switches to English: "Actually, could you do Wednesday afternoon instead?"

Agent switches to English: Offers the available Wednesday-afternoon slot and asks for confirmation.

Caller returns to Czech: Confirms the new time.

Agent returns to Czech: Repeats the final date and time, then ends the call according to the business's instructions.

No separate number or manual language-menu choice is required.

Build and test a Czech agent

  1. Set Czech as primary, or add it to an agent's additional languages.
  2. Choose one of the eight voices that supports the full selected language set—Jana or Jan for a dedicated Czech voice.
  3. Confirm the displayed +3¢ per-minute language surcharge in the builder.
  4. Add reviewed Czech prompt instructions and source content where exact wording matters.
  5. Run Czech-only and mixed Czech-English simulations.
  6. Review pronunciation, transcription, actions, transfers, and fallback behavior before deployment.

Frequently asked questions

Does ThunderPhone support Czech voice calls?

Yes. Czech is one of ThunderPhone's 47 supported voice languages and currently has eight compatible voices in the catalog.

How much does Czech cost?

Czech adds 3¢ per minute to the selected engine rate. The engine-plus-language rate is therefore 5¢ on Spark, 8¢ on Bolt, or 12¢ on Storm, before telephony and other optional charges.

Are premium Czech voices available?

The catalog includes two dedicated Czech voices, Jana and Jan, alongside six multilingual voices. All eight are billed on the same +3¢ per-minute Czech language path.

Is the dashboard available in Czech?

Yes. Czech is a shipped dashboard locale.

Are the ThunderPhone docs available in Czech?

Yes. ThunderPhone publishes a dedicated Czech documentation edition on its docs site.

Can a Czech agent switch to English during a call?

Yes. Add English as an additional language and choose a voice that supports both. The agent switches automatically when the caller changes language mid-call.