These original ‘proto-languages’—from which all others allegedly have developed—were distinct within themselves, with no previous ancestral language.
这些原始的“前语言”——其他语言从其演化而来——各自截然不同，根本不再有更前面的祖先语言。
2
We speak a decimal language because an ancestral tongue, proto-Indo-European, was decimally based.
我们说的是十进制的语言，这是因为我们的始祖语言——原始印欧语——是基于十进制的。
3
Proto-Indo-European is a reconstructed language, meaning, it is what linguists concluded a parent language of Sanskrit, Latin and Greek would have to be like.