Alta works in many languages — both for the written messages your campaigns send and for the AI voice calls Alex makes. This article lists exactly which languages are supported for each, and shows you where to set them.
Who this is for: Anyone running multilingual campaigns, or anyone who wants to confirm whether a specific language is supported before launching.
Written outreach languages (email, LinkedIn, SMS, WhatsApp)
When you build a campaign, you choose the language Alta writes messages in. The following languages are supported:
American English
British English
Dutch
French
German (Formal)
German (In-Formal)
Portuguese
Spanish
Turkish
Lithuanian
Estonian
Latvian
Swedish
Finnish
Norwegian
Japanese
Arabic
Chinese (Mandarin)
Chinese (Traditional)
Korean
Danish
Polish
Italian
Slovenian
Hebrew
Hungarian
How to set your outreach language
Open the Campaign Builder and go to the pitch / value proposition step.
Click the language picker and use the Choose language search box to find your language.
Select it. Alta will generate and personalize all written messages in that language.
AI call languages (Alex)
For voice calls, Alex supports the following languages:
English
Spanish
French
German
Italian
Portuguese
Dutch
Danish
Swedish
Finnish
Polish
Arabic
Hebrew
Chinese (Mandarin)
Japanese
Korean
How to set your call language
In your campaign, add or open a Call step and build your call flow.
Open the Configuration tab and find Voice Settings.
Use the Language field (it shows Select language until you pick one) to choose the language Alex will speak.
Open Voice Selection to choose from the voices available in that language — the voice list is filtered to the language you selected, so set the language first.
Tips and common questions
Right-to-left languages are supported. Hebrew and Arabic both work for outreach and calls, and Alta renders them right-to-left automatically. There is no rule that a language must be left-to-right.
If a language is not on these lists, it is not supported. For example, Greek is not currently available for outreach or calls. Don't assume a language works just because it's widely spoken — check the list above first.
German has two outreach styles. Pick German (Formal) or German (In-Formal) depending on the tone you want with your audience.
Two Chinese options for written outreach. Choose Chinese (Mandarin) or Chinese (Traditional) as appropriate for your market.
The two lists differ. Some languages available for written outreach (such as Turkish, Norwegian, Hungarian, Slovenian, and the Baltic languages) are not yet available for voice calls. Always confirm against the matching list for the channel you're using.
Set the call language before choosing a voice. Available voices depend on the language, so the voice list won't populate correctly until a language is selected.
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