How to get Default language for my domain?

hi, i need to get in my liquid template a variable to know if i am browsing my default language or not, for example

if i’m in 'www.shopdecor.de’ i will get ‘true’ because German is the default option, and if in 'www.shopdecor.de/en’ i will get ‘false’.
is there a variable that gives me this result? thanks!