What language will the voice call be made if the user's default language is not supported?

When a user's default language is not supported for a voice call in a system, the fallback language is typically set to English. This is a common practice in many software applications and services, where English serves as a primary or universal language for communication.

The decision to default to English provides a standardized option that is widely understood, making it accessible to the largest audience possible. This is particularly useful in diverse environments where various languages may be in use, ensuring that even if someone’s preferred language isn't available, there will still be a method of communication that can be used effectively.

Understanding that English is often the international lingua franca helps highlight its role in technology and services aimed at a global user base. Other languages such as Spanish, French, or Chinese may have significant numbers of speakers but do not serve as a default fallback in most systems, and this emphasizes the unique position of English in many global contexts.