I am curious about this claim. What year did the rabbis change the Hebrew language? When and where did they all get together to do this? How did the communities not notice that the rabbis were missing for weeks? How did all the rabbis agree? How did the people not notice that the rabbis were speaking a new language when they returned? How did the rabbis convince everyone to learn the new language and forget the old one? How did they edit out the old language without anyone noticing it? Why isn’t there any real proof of this massive conspiracy? If they all got together and changed the language, why is Sephardic different from Yemenite and Ashkenazic?
Hebrew mostly changed between 167 BC and 600 AD. If you want to know more, then study Hebrew language history.
Yah / shua
Jesus: The English form "Jesus" was not seen nor spoken until after the year 1525,
when Sir William Tyndale a Protestant Reformer from Oxford, England invented it!
His name in English is Yahshua. What you have is Greek forms of the name with a modern Hebrew twist.
Hebrew did not have an e vowel until after 200 AD.
In regards to various stages of Hebrew, the vowel change came after the second century AD.
The vowel e was officially adopted by the Masoretes in the sixth century AD.
Concealing the name of God
Concealing the name of God was not only a custom, it was also made a law.
The sages quoted, "This is my name for ever, and this is my memorial unto all generations" (Ex. iii. 15). Here the word "le-'olam" (forever) is written defectively, being without the "waw" for the vowel "o," which renders the reading "le-'allem" (to conceal; Ḳid. 71a).
Forty years prior to the destruction of the Temple, the priests ceased to pronounce the Name (Yoma39b). From that time the pronunciation of the Name was prohibited. "Whoever pronounces the Name forfeits his portion in the future world" (Sanh. xi. 1).
30 AD to 70 AD.
Abba Saul (2d cent.) condemned the profanation of the Tetragrammaton by classing those "that speak the Name according to its letters," with those who have no part in the future world (Sanh. x. 1); and according to 'Ab. Zarah 17b, one of the martyrs of Hadrian's time, Hananiah b. Teradion, was burned at the stake because he so uttered the Name.
The view that prayer is more effectual if the name of God is pronounced in it as it is written caused the scholars of Kairwan to address a question in the eleventh century to Hai Gaon with reference to the pronunciation of the Shem ha-Meforash, to which he answered that it might not be uttered at all outside the Holy Land (Hai Gaon, "Ṭa'am Zeḳenim," p. 55; see Löw, "Gesammelte Schriften," i. 204).
Because Hebrews dropped their 'ayins', to keep from saying God's name, hence we have "y'shua." Also spelled Yeshua, for which we have in Greek, "Iēsous" and "Isus." These are corruptions of the names that begin with "Yah."
Thirteen theophoric names with "Yeho" have corresponding forms where the letters eh have been omitted. There is a theory by Christian Ginsburg that this is due to Hebrew scribes omitting the "h", changing Jeho (יְהוֹ) into Jo (יוֹ), to make the start of "Yeho-" names not sound like an attempt to pronounce the Divine Name.
Theophoric Names: Theophoric name - Wikipedia
Quote: The Imperial Aramaic script of the earlier scrolls in the 3rd century BCE evolved into the
Hebrew square script of the later scrolls in the 1st century CE, also known as
ketav Ashuri (Assyrian script), still in use today.
Mishnaic Hebrew from the 1st to the 3rd or 4th century CE.
Quote: "Hebrew linguists classify Dead Sea Scroll Hebrew as a set of dialects evolving out of Late Biblical Hebrew and into Mishnaic Hebrew, thus including elements from both but remaining distinct from either."
Source: Hebrew language - Wikipedia
Early Aramaic and Hebrew vowels
The early Aramaic and Hebrew vowel system is reconstructed as a o i u
Summary
The following charts summarize the most common reflexes of the Proto-Semitic vowels in the various stages of Hebrew:
Proto-Semitic: a, i, u.
Proto-Hebrew: a, o, i, u.
Secunda: a, o, i, u.
Tiberian: ɔ, o, i, u.
Babylonian: ɔ, o, i, u.
Palestinian: a, o, i, u.
Samaritan: ( a, ɒ,) u, ( e, i,) (o, u.)
The vowel “a” is pronounced, “ah.” The “u” is pronounced “ow or uw.” And the Ayin is pronounced “ah.”
Yahwah: יהוה
Yashua: ישוע
Some scholars argue that there are too many vowels in some Hebrew words.