Nevermind, I figured out the problem about the TextRenders not changing language, it was a stupid error where I forgot that ‘append’ can’t be localised, whereas format text can be so I have moved to them.
On a serious problem for me though - when localising you can using ‘TAB’ spacing or new lines in the localisation - this is a huge problem for me as a use ‘TAB’ spacing in my controls menu, and I need new lines for my key prompts.