You bought a Chinese computer with a Chinese version of Windows in China and you were upset because there was no easy/free way to change it to English?
Were you also mad at Samsung for not including an English keyboard?
And your heading is 100% incorrect - you say "If you can read Chinese you pay twice in China" - how so? By your own example you only "pay twice" if you can't read Chinese and instead require another language on your Chinese computer bought in China with a Chinese edition of Windows. If you COULD read Chinese, why would you need the English version of Windows?
Windows 7 had the option of changing the install language via language interface packs for free, if you had the Ultimate or Enterprise versions - low-end, "Home" editions didn't have this ability.