Language Switcher Block Translation Question

May be a simple question.

1 – I have a Language block that switches between English and Spanish

2 – The “English” site looks like this: Language | English | Español

3- I would like the Spanish translation site to look like this: Idioma | Inglés | Español

4 – I changed Language to Idioma in the Black translation.

But there seems to be no place I have found where I can change “English” to “Inglés”

Is it possible I’m looking in the wrong place? Or is it possible that change can’t take place because it is set in the block hard code?

Any help is appreciated.

Drupal version: 


Source: https://www.drupal.org/taxonomy/term/22/feed