If the above methods don't work, you might consider reinstalling Adobe Photoshop CS6 Portable with the English language pack:
In certain portable builds, the configuration method differs. If the portable.dat edit is unsuccessful, navigate to the App subfolder within the installation directory: adobe photoshop cs6 portable language change to english
Check for an en_US folder. If it exists, you are lucky. Simply rename any other folders as backup, and Photoshop will default to en_US on next launch. If the above methods don't work, you might