Font problem after theme and wordpress update

Hello everyone,

I recently updated the theme’s newest version (Souffle) and wordpress (4.1), and after doing that, the font of the Greek version which is translated (i’m using WPML plugin) has another font. The font “Roboto” doesn’t work properly when the language selection is Greek.

Here you can see the obvious difference of the fonts:

https://visualmeditation.co/blog/ (English Version)
https://visualmeditation.co/el/blog-posts/ (Greek Version)