Domain name transfer validation emails & form in French or English?

Hi,

I've posted this question on the French community but got no answer so far.
Maybe you would know more as you are the most concerned by the topic.

I'm about to buy and transfer a domain name to OVH. The seller is American and doesn't speak French.

But the transfer procedure is initiated on OVH, the validation emails are sent by OVH and "the two parties provide their validation through an OVH interface"...
https://docs.ovh.com/gb/en/domains/transfer-generic-domain/

So question: are those emails and this validation interface in English or French? As even in the screen shot of the procedure in English is in French :-/
Are the emails both in French and English? Can the seller select "English" on the validation form?

Thanks for your help.
Best regards