Switch language English to Japanese

Dear,

I am trying to switch English to Japanese, just want to change feature bar, menu bar ... to Japanese.

And I do following by youtube guide, it is very easy to change, just tick and untick in Option Language bar, then restart SW.

But in my Computer These feature is not lighting to check, my colleague computer is lighting but when we change, interface still did not change the language.

Please help me to advice for these problem.

Thank you very much!

Jason DANG