The folks who designed this site went for a mix of HTML and PHP, yes. The only WordPress pages are the Order Films and home pages. All the blog posts are done in both languages, too.
Ignore all the HTML pages. Those work fine – but other than having links, they are architecturally independent from the WordPress installation.
The theme is homemade, based on Twenty Ten.
Active plugins are Akismet, Cart66 Lite, Duplicator, ILC Slider, qTranslate-X, Simple Google Analytics, and Twitter Feed. Currently inactive are Jetpack, W3 Total Cache, and some others that have never been used.