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For documentation on app projects in Studio Web, refer to the App Projects chapter in the Studio Web documentation: https://docs.uipath.com/studio-web/automation-cloud/latest/user-guide/apps-in-studio-web.
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Apps User Guide

Last updated Oct 28, 2025

Runtime language

The Runtime Language setting allows App Designers to specify the language that the application uses at runtime.

By setting the runtime language, you help browsers and assistive technologies correctly interpret the app’s content, ensuring a smoother experience for multilingual users.

Using runtime languages

A Runtime Language dropdown is available in the App Designer's General Settings and under the Properties panel of your project. The dropdown lists all supported languages (aligned with the languages available in the UiPath Portal). The selected language determines the lang attribute applied to the HTML document at runtime.

At runtime, language resolution follows this order:

  1. Runtime Language set for the app
  2. English (en) as the default fallback
Note: Default and Backward Compatibility
  • New apps: the Runtime Language defaults to the user's Portal Language Preference.
  • Existing apps: the language remains English, maintaining current behavior.
Important: The Runtime language applies only to Apps Runtime. Action Apps continue to follow the user's Portal Language Preference.

Example

If in App Designer we set the Runtime Language to Spanish (ES), the runtime will render:

<html lang="es"><html lang="es">

This ensures that assistive technologies and browsers correctly interpret the app content.

Note: For best practices and tips, visit the Runtime language best practices guide.
  • Using runtime languages

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