I have problem with menu url

menu url always point to en-us pages(except for "Language Neutral" page)

actually when I change language of site the menu must point to for example /fa-ir/Page2 or /fa-ir/Page3 but it is point to /en-us/Page2 or /en-us/Page3

except this problem everything works fine for example when i go to page2 in (en-us) and change language to fa-ir the correct page has been shown.