IBP : translation for period name in header Excel

Hi,

I'm trying to use IBP in French. I have activated the French in the Fiori tile. I have translated my template. Everything is fine, except the header for time period.

We can see weeks displayed in "CW" for Calendar Week.

In French, I would like to have a "S" for "semaine" instead of "CW".

How can I do that?

Thanks,
Marion