if it is a Windows 7 OS, you can download the English language Win 7 ISO then install that, activate it using the serial no. provided to you on the laptop. Make sure to create a set of product recovery media from Drive Q (Lenovo_Recovery) before you do this.
This is the only way to do it, as Lenovo can't provide a different language installation media. (in the old day the recovery media Lenovo ships have every language, but that no longer seems to be the case).
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft