Thanks for the reply CW, and for addressing this via discord also.
Yes this did work in 3.5.1, I tested it just after the original post and the workaround worked perfectly by just manually adding the strings/lines to the bottom of the translation file.
Yes this did work in 3.5.1, I tested it just after the original post and the workaround worked perfectly by just manually adding the strings/lines to the bottom of the translation file.