Login Page "Language" customization

Hello Team,

Please find the below details and help me fix it.

While customizing the login page we tried to change the "Login " text field,“Password”- password field and “language” lookup field.
For “login” and “password”,it worked perfectly fine as they carry style sheet.But unfortunately “language” lookup field doesn’t carry any such stylesheet.Then we tried the same through the “lookup field id”,but it didn’t work. Whereas our goal is to extend the text field of “Language” textbox.

Please help us in achieving the same.,may be through id or any.

Best Regards
Alka Mishra.

Hello, Alka

Could you please provide a mockup showing how you want your login window looks. It would be helpful for me to give you the advice to achieve a final result.