I'm browsing the documentation for some time, but couldn't find what I'm looking for

I would like to define a tag that allows me to access a specific content block based on its name and a page ID.
My idea is to build a multi-lingual version of my site without using the old 1.0.2 MLE branch.
It would work by picking up the right content blocks depending on the selected language.
For instance, I would thus add the following blocks for French to my template, that would replace the {title} and {content} of the page
{content block="FRmenu"}
{content block="FRtitle"}
{content block="FRcontent"}
I would then just need to make the menu using the blocks named "FRmenu" instead of $node->menutext... and that's my problem! I couldn't find where and how are these extra content blocks stored.
Thank you for your advices.
PS: Is there something else than this doc? http://www.cmsmadesimple.org/apidoc/
If often see you guys using $gCms and don't know where you get the doc from. Sorry if I sound stupid.