Someone was asking about this a little bit ago, and I was finally able to find the old post.
This is a list compiled off an old thread on OKA of what various angelkin remembered the angelic language being like. I think in total there were between 6-10 contributers to this, though I can't remember who they all were, and as OKA no longer exists, i can't go back and check.
Naāher (short vowel sounds, emphasis on second syllable, second syllable can be said either āherā or āhairā)
*means ābeloved younger siblingā (used in context, it can mean either brother or sister)
Khaāshet (short vowel sounds, emphasis on second syllable)
*means ābeloved older siblingā (used in context, it can mean either brother or sister)
Eāshar (short vowel sounds, emphasis on second syllable, first syllable is said āayā)
*means ābeloved twinā (used in context, it can mean either brother or sister)
Kheāneāsarāet (short vowel sounds, emphasis on both first and fourth syllables)
*means āteacher-friend who is like a parentāā¦itās like a personās mentor or teacher, one who is usually older than the person addressing them with such a title
Laānaāpfeth (short vowel sounds, emphasis on both first and third syllables, the āpā is ALMOST silent)
*means āI love/cherish/respect youā
Lāfar (short vowel sounds, emphasis on second syllable, the āLā is said as if you were going to say ālipā but cut it off just before the vowel left your mouth)
*means ābeloved oneā, a term of affection for a person you are especially close to (almost romantically but something more than romantically, butā¦eh. I donāt know how to describe that, sorry)
Eāneh karha naātha-shur, a nehaāek arhāsa (short vowel sounds. Emphasis is as follows: first word (first syllable, the first syllable is said āayā), second word (first syllable, and the āhā is silent), third word with hyphen (first and third syllables), fourth word only one syllable, fifth word (first and third syllables), sixth word (first syllable))
*I donāt know what it meansā¦yet. But I was feeling weird, like someone was watching me, and I said it, and whatever was watching me instantly vanished. So I believe it is some sort of phrase of blessing or protectionā¦heck, it might even be cussing, who knows.
'Ethe na shel'tan (short vowel sounds, the second āeā of the first word is said āayā. Emphasis is as follows: first word (first syllable), second word only one syllable, third word (first syllable)
*means ābe my aidā or āhelp meā, usually is implied that this is directed at Daddy dearest
Shiāi khat-āek (mix of vowel sounds, the first āiā is a short āiā sound whereas the next āiā is a long āeā sound, the rest of the vowels are short. Emphasis is as follows: first word (second syllable), second word with hyphen (second syllable))
*This is a very rude/pissed/stressed-out way of saying āshut upā, or more accurately āshut your foul mouthā.
Neāether āsha (mix of vowel sounds, the first two āeās are short, the last āeā is said āayā. Emphasis is as follows: first word (second syllable), second word one syllable)
*This is a quite derogatory term for an enemy, and it can mean various unsavory things depending on the situation.
karāe khepf- Essentially, get the fucking lead out.
Naāarshet- Beloved sibling, possibly sibling that I love but also annoys the crap out of me.
Kāharemph- phrase or term for someone who you are fond of but just did something exasperating.
Gi resh- a greeting, but only used between two angels on very intimate terms (like twins, or primary lovers)
Shāvenāta- (short vowel sounds, emphasis on second syllable)
*Means āI miss/regretā or expresses a feeling of longing for a person or place.
Naāvarahnta- Some sort of fond farewell
Khiphf- essentially, Fuck.
Al adee rokashi avab amet
Elemakhāta orsoālet-tayāyah meleksha
Onamay-eh-tay seh-etta tay-eloo
rowdowātah elemaānanoh way-sar-ehtay tay-eloo
There are possibly a few different dialects going on here, but this is a pretty good sample of what myself and several others remember the angelic language being like.
I've also submitted this to STFUO since they are a linguits and i'd love to get a real critical analysis on this.