[i18n] lang in shortcodes/anchor_link

I would like to use translations in shortcodes and anchor links. The anchor links use may not be obvious but is for accessibility issues i need to translate the aria label.

I’ve created a simple, naive patch here. There may be much better ways to do this, suggestions are welcome :slight_smile:

Adding the language to every possible templates make sense! Please do a PR and we can discuss the code

I will thanks