Simplifying your English will have minimal effect on your style but it will greatly enhance the ability of non-Americans to understand your writing. Which is just the right feature for users who want what works. Unfortunately, the idioms and trendy syntax will confuse many of the millions of internet users who can read English but do not have native fluency in the language. The Style Finder then returns product suggestions based on their individual preferences. This convenient feature is exactly what online shoppers want.
Localization is still important because most people prefer to read content in their native language.
However, if their native language is not among the handful you've chosen to localize into, they would much rather read Global English than English that is full of idioms, buzzwords, euphemisms, and unexplained acronyms. There are two reasons why an English version works internationally. The first reason is that people who are incompletely fluent in English usually can read it more easily than they can speak it. In the case of a web site, translation would probably happen casually. For example, someone would download one of your English pages and then ask a bilingual friend to explain its essential details in his or her native language.