[suggestion] Language variations.

Hi. I wish a feature named ‘Language variations’. (‘linguistic variations’ better?:)
Sometimes I want to post single text as in multiple languages.
Of course I can make separate blog site for each language, but in that case, postings cannot be coupled.
Important is identity of posting. I wish postings contains same content but in difference languages being coupled each other. And even better if they can be identified as variations of same content.

I don’t think this is possible with only plug-ins. Internal structure may be supported.
However please let me know if this is possible with only plug-in.
Thank you for reading.