Using The Same Web 2.0 For Multiple Sites?

I have a few quality web 2.0's that i've spent time building backlinks and writing 100% unique content. I've just opened another website in a different niche then the web 2.0's ( actually in a different language as-well) and i was wondering if using the same web 2.0's for backlinks will be good for my website. Like including links in articles or maybe blogroll. I hope i'm being clear enough thanks for any help

I wouldn't recommend that.

First of all, cross-language links are not that powerful.

Second, you leave a clear unnatural footprint.

Third, if your blogs get deindexed or flagged, you risk a penalty for both money sites.