How to change screen resolution and language.

After installation, the resolution of the system is 1024x768. But my laptop screen is 1280x800. When I try to change, an option 1280x800 not exist.

Another question, how to change the language of the system?

Yast - System - Language

Re Screen:
Tell us what you are using PC or Laptop. Graphics chip/card? Monitor?

Geforce 7150M. HP Pavilion dv2710us.

Have you installed driver for that Nvidia?
HCL shows: HCL/Nvidia Video Cards - openSUSE

Nvidia drivers:

let us know how you get on.