Hello! I optimize my websites for german SERPs. On the one hand that is very googd because SEO in german are very low skilled because in Germany Communities like blackhatworld with known facts not exist. But on the other hand my bought SEO tools autopligg, prstrom, LFE use US-Backlinks predominant and the best backlink sources come also from the USA. What is the effect of these foreign-language backlinks? Does google use some damping factor for them or will google de-index or classify my pages wrong? What is the accept limit in percentage of foreign-language backlinks? Sry for my low english skills.