Sharing Clarivate's last comment about this issue:
"I discussed this matter with the Primo Product Manager, and at this time, it will continue to be addressed as an enhancement request through the Ideas Exchange, rather than as a bug. This is a complex issue that requires careful consideration and evaluation of its impact on other system components.

Looking ahead, the 2026 roadmap includes plans to offer enhanced control over the normalization of Search Fields, which will directly affect the related facets. You can find more information here: https://knowledge.exlibrisgroup.com/Primo/Product_Materials/Roadmap/006_Primo_VE_Roadmap_Highlights%3A_2026_-_2027#Custom_Normalization_Rules_for_Key_Search_Fields"

In the NDE this also happens to the titles of the facets, also in English, please include that in the fix.

This is a bug, please fix it. I would rather spend my votes on real ideas.

Same here: https://slsp-unige.primo.exlibrisgroup.com/discovery/search?query=any,contains,suisse&tab=41SLSP_UGE_MyInst_CI&search_scope=MyInst_and_CI&vid=41SLSP_UGE:VU1&lang=fr&offset=0

Please fix this problem! Changing the case isn't very nice, but removing apostrophes is disastrous for French.

This issue has not been resolved with the NDE, and the display remains grammatically incorrect. Could you please correct this in the new interface?

Thank you very much for your attention and kind regards, Irene

Can confirm
https://basel.swisscovery.org/discovery/search?query=any,contains,roman%20d%20amour&tab=UBS&search_scope=UBS&vid=41SLSP_UBS:live&facet=genre,include,Romans%20Nouvelles%20Etc&lang=fr&offset=0

Feels more like a bug report than a feature request to me.