Copilot Chat Pane Not Recognizing Synonyms in Power BI Service (Works in Desktop)

Hi AsadullahNoor12 ,

Thank you for sharing the detailed explanation and supporting visuals that’s very helpful for understanding the issue.

As of now, there is no publicly documented change in how Copilot within Power BI Service handles linguistic schema synonyms. However, it's important to highlight that Copilot in the Service is still undergoing enhancements, and its behavior is not yet fully aligned with Copilot in Power BI Desktop.

1. What you are experiencing appears to be a current platform limitation. While synonyms defined in the Q&A setup are correctly recognized by: Copilot in Power BI Desktop and Q&A visuals in Power BI Service. They are not yet fully recognized by Copilot in the Power BI Service chat pane. This discrepancy is not intended long-term and may be addressed in future updates, but at this time, it reflects a known limitation rather than expected full functionality.
2. There are no additional configurations currently available in Power BI Service to force synonym recognition specifically within the Copilot chat experience. For best results:

Make sure that all your synonyms are properly saved in the linguistic schema by setting them up through the Q&A setup before you publish your report. After publishing the report to the Power BI Service, it's important to refresh the semantic model to ensure all the latest changes are applied. Also, double-check that the language and regional settings of both your model and the workspace match the language used in your synonyms. This helps improve the chances of those synonyms being recognized correctly.

Since Copilot in Power BI Service is still in preview and rapidly evolving, and given this behavior diverges from what’s expected, we recommend raising a support ticket directly with Microsoft to formally track this behavior and receive updates. This will also help escalate visibility if this is impacting your business workflows.

You can open a support request here:

How to create a Fabric and Power BI Support ticket - Power BI | Microsoft Learn

I hope this will help you understand better, if you need any further assistance, feel free to reach out.

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Thankyou.