Hello Good People,
I was able to change Photoshop CS5 Spanish interface to English(default) by changing file name "tw10428" to ""tw10428.bak"
(path C:\Program Files\Adobe\Adobe Photoshop CS5.1\Locales\es_ES\Support Files).
However Dreamweaver CS5,Fireworks CS5 and Flash CS5 have different file structure and names. How do I change their
interface from Spanish to English?
You will have to purchase the English edition(s). You can't swap languages. The CD key is tied to the version and language.