[Theme: ToomMorel Lite] French accents don't appear

Hello, I am french.
I chose and installed this theme. This one looks very professional and easily manageable…

I have 2 questions :
– First of all, French accents are not displayed! And I don’t have a clew where I should set it to solve the problem…
– Secondly, I would like to add a langage option (french, english,etc). Is it possible to install this kind of extension with this theme?

Regards,
shensi

https://www.ads-software.com/extend/themes/toommorel-lite/