Actually that word order wouldn’t necessarily be better. "To be" is a linking verb and quite often appears between the two things it links.
Such as: - pater est. - est pater. - is est pater.
It is exactly how it should be in Latin. Verb always goes on end. e.g. "Alea iacta est". Therefore, "Is pater est" shoud be more in the manner of Latin language.
Well that’s one example from one author.
The verb “to be” often occurred at the end, like other verbs often did. But it also often was placed between the things it was linking.
Here is an another example from Caesar, the same author you cited: “Gallia est omnis divisa in partes tres.”
Would it mean the emphasize in the Caesar's quote be more on "3 parts"?
That's not a good example, since there "iacta est" is the verb (it's the perfect passive tense), and it is actually quoted by Suetonius as "iacta alea est", which if anything shows off Latin's flexibility, since the subject is actually placed in the middle of the verb: "cast the die has been".
There is certainly no strict rule about verb placement in Latin. In Cicero's writings, to take Latin's most revered and imitated prose writer as one example, fewer than half of the sentences end with a verb.
Remember pater and mater do not rhyme in Classical Latin. :)
[ˈpa.tɛr ɛt ˈmaː.tɛr]
Besides, these words are related to father and mother and for the same reason it's not father and mather or fother and mother ;)
That's very interesting to note, but no English words (except some science and law vocabulary) comes directly from Latin, here father is from Old English fæder, from old Germanic (proto-Germanic) fader, and mother from Old English moder/modor, old Germanic mōdēr. Not directly from the Latin, so it's probably only a coincidence, but one interesting to note.
Fader -> Father. Moder -> Mother
That's right there's a "a" and a "o", so what you said is not impossible, that it kept the "a/o" distinction from the same origin. But Proto-germanic is not derivated from Latin.
I can't hear any audio. There have only been two sentences yet where I could. But the audio was wrong anyway (judged by the Classical pronunciation which they claim to be using).