Finding a legitimate download for Macromedia Dreamweaver 8 can be tricky since it is legacy software released in 2005, prior to Adobe's acquisition of Macromedia.
A well-known repository for "abandonware" and vintage software. They typically host the original installers and documentation. Internet Archive (Archive.org): Download Macromedia Dreamweaver 8 English Version
Because it is no longer sold or supported by Adobe, you won't find it on their official creative suite site. Your best bets for a safe, English-version download are: Finding a legitimate download for Macromedia Dreamweaver 8