Try to change the name in the Sonos app and quit the Skill of Sonos and after activate it again (and also re-authorize it on the Sonos app if required)

This has nothing to do with Alexa or Sonos. You need to check the language keyboard on your device.

Thanks, will try!!

? Langage keyboard? I have 2 keyboard, French and US.

I think that ​@AjTrek1 was referring to a another type of letters that were not like ASCII or Unicode and were not supported by any of both apps.

​@leo07 ​@AjTrek1 ,

no pb with my keyboard. I have other device with é and è without problème!

What am I supposed to do with my keyboard?

Nothing was only a advice, your keyboard I think is well but did you have tried what I mentioned to you?

Extended characters, such as the ones you mentioned, aren’t always supported by each app. It doesn’t always correspond to the settings of the ‘keyboard’ in your OS. 

But, if you’re having issues with an Amazon App, such as the one to set up Alexa, you may be better served by contacting Amazon. 

Ok but seems that special characters are supported.

télé and bibliothèque are good :)