Really fast and good support, i send a mail to support@autel.com to change language to french, and i got answer really fast.
Thank you very much

For other like me who need help :
1/ you need to ask support to change to the good language BEFORE install all the update. (before open the box :D) and wait to have the answer from support.
2/ Download the MaxiDAS_PC_Suit_V6.32 and install it on your PC (not on the maxidas).
3/ save all the content of the SD card on your PC.
4/ Format the SD
5/ launch "DS708 Update" by desktop icon (not the Autel update, icon is like your diag)
6/ Choose the letter of your SD on the right.
7/check the update, and install it, !!!

8/after software install you have to do all cars updates  in the good language.
 you can do it on your PC (better), or later with the maxidas connected to network

9/ put sd into maxidas, and you got it in the good language.

10/ SAVE all the SD card content on another one, and on your PC, you need it if you broke the sd, and you have not bought another year of support.