Hi mateus1020 ,
Thanks for the compliment! 😊
Unfortunately, Buttonizer currently doesn't have language plugins support.
Although, it is in our list of feature we would like to implement in the future but it isn't our main priority.
You can however use Buttonizer's Page Rules PRO feature to make buttons appear/hide on certain pages.
You can for example make a French button only appear on your site's French pages.