hi Daniel,
I don't have much knowledge on legal, my honest question: why is it unacceptable?
This pagure repository is really hidden with low visibility
I suggest to open the question on https://discussion.fedoraproject.org to get more visibility and feedbacks from a wider diversity of people, with more experience on legal

I don't have much knowledge on legal, my honest question: why is it unacceptable?

The use of Weblate in Fedora should be subject to an agreement between the Fedora project & the provider. Once agreed by Fedora the project, Individual Fedora contributors should not be required to individually sign legal agreements to use a Fedora service.

It contains nonsensical terms such as

For the avoidance of doubt, the Parties explicitly confirm that they are business entities and that they are entering into this Agreement within the scope of their business activities.

Fedora contributors aren't business entities and cannot "explicitly confirm" this.

There are a whole bunch of terms about payment and invoicing which no Fedora contributor should be expected to agree to either.

This pagure repository is really hidden with low visibility

This is documented as the placed to report problems on the i18n team page ! https://docs.fedoraproject.org/en-US/localization/#find-l10n

Just for reference and FYI,
a link to the related Fedora Council's discussion summary

I think once the T&C will be removed from translate.fp.o, this issue can be closed...?

This issue has been migrated to the new Fedora Forge: https://forge.fedoraproject.org/localization/tickets/issues/45.

Please refer to the new forge for any following discussion and/or resolution.