I have two questions regarding the terms listed under Content Keywords in Google Webmaster Tools:
We've recently lost a lot of ranking in Google search after we changed our e-commerce platform and added translations to foreign languages. We run a US site, but most of our content is translated into Spanish and French for customers' convenience.
Recently, we realized that the top 3 "significant" keywords are all in Spanish. 99% of our customers use English as their first language, and our Google search results ranking has dropped significantly for terms listed at much lower significance in Google Webmaster Tools (e.g. listed at number 8, 13, etc...).
So my questions are:
If the quality of our English content didn't change but we added foreign languages to it, would the "foreign" content take away from our ranking for English terms? The top Spanish terms don't even display our site when searched on in Google. I know this isn't an exact science, but I'd like to hear some feedback based on experience. I read in this article that there is no relevancy between this list and actual search engine ranking (however, the author is suspicious).
At rank number 4, we have a keyword "____", which is literally just an underscore. What does this mean?