Here is the statement from the new, new rules not yet published, published, published
Vocabulary or word lists that consist of only foreign words or short phrases which are followed by translations without any intervening punctuation are brailled as follows. Ignore special typeface used for the listed words. Insert a colon following the entry words and continue the translation on the same braille line.
And there's the deal. You HAVE intervening puncutation. So you are absolutely correct. Leave the commas as is, use contracted braille for the English and the reader will get the pattern of the punctuation separating the languages.
On this particular point, the current manual says the same thing.
Thanks for the interesting question.