The following backslash is displayed in EN, KO (Malgun Gothic, 굴림), JA language respectively as what we are expected it should be in Pixel

The following backslash is displayed in EN, KO (Malgun Gothic, 굴림), JA language respectively in surrogate + pixel by Canvas

The following backslash is displayed in EN, KO (Malgun Gothic, 굴림), JA language respectively in surrogate + pixel by PNG