Yes, using Cloud WAF (formerly Incapsula) will provide your website with a Global Presence by spreading it around the world on a network of high-powered servers - each within its own local IP. However, in doing so, it won’t hinder your SEO (Search Engine Optimization) or affect your website’s localization data.
This is because Google and other Search Engines mainly use Top Level Domain data to determine the website’s geo-targeting (i.e. if you got a .fr domain, you will be marked as a French website).
In case of a generic TLD (Top Level Domain) like a (.com) or (.org), your locale will be decided based on information provided by the website owner. Only when no such information was provided, the search engine will turn to look at other telling signs like On-Site Contact Information, Visitor Profiles and etc. Only at this point, your website’s IP will be used for geo-targeting, but even then it will be counted as only one of the localization factors.