Hello @Lagaf27 ,

Welcome to our community.

According to Google Translate, Looks like that you'd like to know if you can manage your TL-WPA4225 KIT powerline adapters with the TP-Link Tether app (as you already do with your RE365 extender), and if not, how to get the tpPLC app in French.

If there is any discrepancy, please describe it in English. 

Unfortunately, TP-Link powerline devices are not compatible with the Tether app. If you want to manage your powerline adapters, you need to download the tpPLC Utility software to your computer. You can also download the tpPLC app to your phone for some compatible models.

tpPLC app compatibility list: https://www.tp-link.com/powerline/compatible-devices/

tpPLC app and tpPLC Utility software download guide: How to prepare for using the tpPLC Utility (new logo)

If you need further assistance, please contact the local support team for further assistance.