I might have corrupted something in the language file, and before I perhaps do more damage I'll ask:
#Sys.btn.C07CA343# Equaliser && DSP... as you can see has two ampersands.
I believe they are there on purpose, and when English is selected only one is displayed, but when I use it in my Dutch translation file, as you can see they both show up?

edit,
Checking some other translations (German, Polish), and they chose to replace '&&' with the word meaning 'and'.