Hide or show block based on language selection

I am using GTranslate, and looking for some way to hide and/or show a particular block or element, based on changes to the language selection. I have seen the example javascript on how to detect the current language setting:

https://docs.gtranslate.io/en/articles/1349939-how-to-detect-current-selected-language

But I don’t know how to apply this to hiding or showing a block.

Thanks