Breadcrumb and multilanguage

Thanks Bob, but I can’t make it work.

I tried to paste this HTML in one of my posts using the HTML editor and didn’t work. My post only shows this text:

Home
›
{{post.mainTag.name}}
›
{{post.title}}

And when I go back to the HTML editor the major part of the code has been erased.

Any help would be appreciated. Thanks.