[D11] [UI] Fixes for bugs 3869, 3872, 3877, and 3881. English US language default fallback set and loosened boot-up language code so it doesn't try to find closest matching (it either perfectly matches, or returns English US). Localisation fixes for Playstation(R)4 text and Favourited/History translations. Removed "PLACEHOLDER" text in localisation files. Fixed backend text showing when reporting a player.