Thread:SEOkitten/@comment-5973717-20150913153211/@comment-26321732-20150915151655

Each language (and even a mix of these languages) might not be a problem for the bots, but the product and engineering groups don't have the resources to test and monitor that at this point. It would be best to provide training and staff support for each of these languages (as ComDev does for CSS/JS today), but there are just not enough hands on deck.

Bad code happens! Place one on the wrong navigation container, and it is easy enough to block or limit the search bots' access and not realize it.

Humans are impacted when the client-side scripts makes multiple browser calls and are slow to load, create image-based navigation that limits access to important pages, and more.