AncesTree

Here, I'd like to propose a very simple modification in how people look at ancestry and heritage, at culture, at ethnicity.  

Instead of spending countless weeks/months and quite a bit of money and energy thinking about one's ancestors--not parents or grandparents, but those we have not met-- and narrowing down their accomplishments, contributions, story, movements, etc, I reckon it'd be more interesting and more relevant to think about language.

How did that (or those) generation(s) speak?  Which modifications did they bring to language, dialects, accents?  Which slang words did they use, if any?  Did they write letters? If so, is the handwriting still legible?  

Which branch(es) of this tree would have house them, if any?

Tree of Languages; One Common Ancestor: Proto-Indo European