Evolving Technology of the rapidly changing web must constantly be evaluated against the capabilities of assistive technology and evolving assistive technology must be evaluated against the backward compatibility of existing - web sites.
+ web sites. This challenge is further complicated by versions of content adapted for multiple device modalities, eg. mobile vis a vis full-screen view. There may also be multiple language versions of each of these content views to be evaluated with browsers and assistive technologies commonly used with specific languages.