See the related link below for official information from Adobe on how to change your language setting.
There is no way how to change it when installed. You have to rainstall it and change language in the start of installation. There are so many different versions with diiferent languages, so you must have one with language you want. p.s. Sorry for my bad English.
Adobe Photoshop is not multilingual. You must buy or contact support for localized version.
The language is set during installation if done via a legal copy. However, to change - Edit >Preferences - then select Country/region
Go EDIT - Preferences - Country Region. However if this is a legal copy of Photoshop you should have been able to select language on install.
You can not change language to Punjabi because Photoshop currently do not support that language.
Go to Edit > Preferences > Interface then look at UI Text Options
Edit > Preferences > Interface look at UI Text Options section.
You must buy localized version of Photoshop. Adobe Photoshop officially does not ships as multilingual.
click on brush on left side
Portable version is not supported by Adobe, there isn't portable version available, you should think about using portable Photoshop.
In www.microsoft.com/bih/
You have to have files from original CD to change the interface language.