ⲟⲩϫⲁⲓ ϧⲉⲛ ˋⲡϭⲟⲓⲥ
ˋⲛϣⲱⲣⲡ ⲙⲓⲱⲧⲉⲛ ⲧⲏⲣⲟⲩ - ϯⲟⲩⲱϣ ˋⲉⲥⲁϫⲓ ⲛⲉⲙⲱⲧⲉⲛ ⲉⲑⲃⲉ ⲟⲩϫⲓⲛⲙⲉⲩⲓ ⲉⲑⲃⲉ ϯⲙⲉⲧϫⲓⲛⲥⲁϫⲓ ˋⲛⲧⲉ ⲧⲁⲓⲁⲥⲡⲓ. ϯⲙⲉⲧϫⲓⲛⲥⲁϫⲓ ˋⲙⲡⲉⲛⲓⲱⲧ Ϣⲉⲛⲟⲩϯ Ⲙⲁϩⲉⲣ ˋⲥⲉⲣⲛⲟϥⲣⲓ ⲣⲱ ⲁⲗⲗⲁ ˋⲥⲉⲣⲛⲟϥⲣⲓ ϧⲉⲛ ⲛⲓϧⲁⲉ ˋⲛⲁⲛϣⲉ ˋⲙⲙⲁⲩⲁⲧϥ. Ⲛⲁⲓⲛⲁⲩ ⲉϫⲉⲛ ⲟⲩⲁⲛⲥⲁϫⲓ ˋⲛⲆⲉⲙⲟⲧⲓⲕ ⲟⲩⲟϩ ⲟⲩⲁⲓ ˋⲛϩⲱⲃ ˋⲛˋϥⲑⲱⲧ ⲁⲛ ⲛⲉⲙ ϯⲙⲉⲧϫⲓⲛⲥⲁϫⲓ ˋⲛⲁⲡⲁⲥ ˋⲙⲙⲁⲩⲁⲧϥ - ⲫⲁⲓ ⲉⲧⲉ ϯϫⲓⲛⲥⲁϫⲓ ˋⲛⲧⲉ "Ⲃ" ˋⲙⲫⲣⲏϯ ˋⲛ "ⲞⲨ" ϫⲉ ⲁⲓϫⲓⲙⲓ ⲟⲩⲙⲏϣ ˋⲛⲥⲁϫⲓ ϧⲉⲛ ⲆⲈⲘⲞⲦⲒⲔ ⲉⲧⲉ ⲟⲩⲟⲛⲧⲟⲩ "Ⲃ" ϧⲉⲛ ⲛⲟⲩϩⲟⲩⲓϯ ⲁⲗⲗⲁ ⲁⲩⲉⲣⲥⲁϫⲓ ˋⲙⲙⲱⲟⲩ ϫⲉ "B" ˋⲙⲙⲟⲛ "W"
Ⲓⲥϫⲉ ⲧⲉⲛⲟⲩⲱϣ ˋⲉⲥⲁϫⲓ ϧⲉⲛ ϯⲁⲥⲡⲓ ˋⲛⲣⲉⲙˋⲛXⲎⲘⲒ ⲓⲉ ⲙⲏ ˋⲥϣⲉ ˋⲛⲧⲉⲛⲛⲁⲩ ⲉϫⲉⲛ ⲛⲓⲥⲁϫⲓ ˋⲛⲁⲡⲁⲥ (Ⲇⲉⲙⲟⲧⲓⲕ) ˋⲛⲧⲉⲛϫⲓⲙⲓ ϯⲙⲉⲧϫⲓⲛⲥⲁϫⲓ ˋⲛⲛⲟϥⲣⲓ?
(Just in case I've made a mistake which I probably have, here's the above in English
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I was looking at a Demotic dictionary the other day, and pretty much everything agreed with Abouna Shenouda Maher's pronunciation EXCEPT Beta as "W". I found many examples of words which Abouna would pronunce with a 'w' which are spelled in Demotic with a 'B' (e.g. ⲃⲁⲗ (spelled 'bl' (demotic doesn't use vowels, so we know from Coptic that the sound between them is 'a') but note that it is not spelled 'wl'). I think that if we are to start speaking Coptic again, we should leave out this change as one, it makes things unnecessarily confusing for those learning to read Coptic (B looks like Ⲃ) and I highly doubt that its pronunciation goes back more than 200 years - it is likely to be an Arab corruption of the pronunciation. I agree there are some words which BEGAN to be spelled with Beta when this pronunciation was introduced, but those words often have an alternate spelling using ⲞⲨ instead, so we can tell.
You can find the dictionary here, its VERY interesting:
http://oi.uchicago.edu/research/pubs/catalog/cdd/ I recognised many words that we still use today in Coptic that are written on manuscripts 2000 years old! It is also interesting because it may be the key to reintroducing 3ain and the glottal stop to Coptic and differentiating between a solid ϫ (g) and a soft ϫ (dj) because again, demotic uses two separate letters for these sounds. If you want to investigate Beta, download the "B" chapter of the dictionary (5th from the top) because many words that OB prounounces with a 'w' are actually found there.