multi language SESSION default don't work

hi,

i create a multi language application with default language as English

when i log in without choosing a language, all appears in English as default but my drop-down base on the language doesn't work, i get a blank drop down that says please select. i have to select other language like Spanish or Italian and then go back to select English in order of my drop down to work
im using

to locate the language in use.
when manually select any other language works Ok
any idea how can i solve this? thank you