How-to handle Inbound Marketing strategies with Multi-Languages Web site

Separate Twitter Accounts

Twitter is a tool for conversations; even if many of the tweets are starts of conversations your followers choose not to join. What will turn followers off, though, are tweets that start conversations they can't join, because they don't understand them. I'd have an @Zoomission account, and an @ZoomissionFr account.

Multi-Language Blogging with Wordpress

For your blog, I know Wordpress can do multi-language support; you'll need to do some research on how to best implement it, since ideally you want to be able to provide a human-written translation, that's displayed automatically based on the IP address of the visitor (or by choice, for french-speaking Canadians), with minimum variation in the URL, for SEO purposes (e.g. www.blog.com/category/post-title-goes-here?lang=fr vs. www.blog.com/francais/category/post-title-goes-here).

Facebook, Priorities, & Effort of Localization vs Translation

I'd agree with dharmesh that keeping up multiple presences takes a lot, but I'd disagree about the priorities of locations first, multiple languages later. Try multiple languages via the two twitter accounts (which I think will get you more results than a Facebook fan page anyways), and use them to get a feel for what effort is required for even short-form multilingual content. See if translating content you post on one account is enough, or if you're finding that people in different areas / part of different networks based on language respond better to totally different content.