:
It's probably static.
The "zz"s might obscure parts of a word:
na'ZZ'tso'ZZ'
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That's a good point, perhaps "dibeh" fits in those gaps in some form, and his message was interfered with and sent in 2 parts?
EDIT: na-dibeh-tso is an anagram of "Abe nod sith"
Abe is a jedi.