> For the complete documentation index, see [llms.txt](https://docs.saas.haut.ai/haut.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.saas.haut.ai/haut.ai/releases/changelog/version-2026-20.md).

# Version 2026-20

## Release date

May 14, 2026

## Studies

Version 2026-20 improves the Study tool for multilingual participant journeys and more flexible study schedules.

### Participant-facing localization

The end-user Study tool now supports translations and localization for participant-facing pages.

* Participant-facing Study screens can now use localized interface text.
* Existing Study setup and API integrations do not require changes.

Learn more: [Studies](/haut.ai/haut.ai-features/studies.md) and [Study Interface for Participants](/haut.ai/haut.ai-features/studies/participants-point-of-view.md).

### Flexible stage gaps

Study schedules can now include gaps between flexible stages. A gap is a period when participants do not need to upload photos and cannot submit study photos.

* Use gaps for waiting periods, washout periods, product-use periods, or other pauses between photo collection stages.
* Gaps are included in the participant's study timeline and affect the total study duration.
* During a gap, no photo submission is required.

Learn more: [Create New Study](/haut.ai/haut.ai-features/studies/step-1.md#flexible-stages).

### Enrollment window control

Study setup now supports an enrollment window value of `0`, which disables the enrollment window.

This is useful for studies where participants are managed directly and should not have a separate open enrollment period.

Learn more: [Create New Study](/haut.ai/haut.ai-features/studies/step-1.md#enrollment-window).

***

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