Greasy Fork is available in English.
ESC to go back to Normal, Shift +: F for FPS, Z for background, X for no edges, V for colored edges, [- to lighten color, + to darken color (increments of 0.05, causes weird behavior if not between 0 and 1], B for no scoreboard, N for no names, M for raw health values, G for green shapes mode, [ for no achievement screen, 9 for no health bars, 0 for no UI.