First of all, English is not my native language, I hope you'll understand, what I write

I got an issue with the content keywords generated by Phoca Gallery itself. I use Google Webmaster-Tools to check my site to see how it looks to Google's crawler. When I checked the content keyword optimization

The top 13 keywords Google recognizes are all generated by Phoca Gallery, they have nothing to do with the "real" content published on my Website.
For example: To Google the keyword "Bewerten" [English = rate (a picture)] is the most significant content keyword on my page. It appears 2848 times!
Can I exclude content keywords in general for crawlers and bots for example to solve the problem?
Or does someone have another idea?
Best regards
Jan