SPOILER ALERT. Stop reading if you want to work out the alien speech for yourself.

I first noticed what you were doing in episode #116. Cronmora started her sentences with the same letter, which I assumed was “I”. It could also have been “A”, but that’s not as common in first-person speech. Unless you’re Yoda. Thank you for not making anyone speak like Yoda!

Episode #116 also has a fair amount of “common tongue” to work with. More is better.

I assumed the second word was “see”. The letters just looked like “s” and “e” to me. Luckily “I see” fits the scene and the common “I (verb)” sentence opener.

Context is very important when guessing.

I entered what I had so far into a text editor. Deciphering involves a lot of glancing back and forth, so matching the original line breaks helps a lot.

i see —
–e -e– e—–
– -e s—-i–
——!

e—– –
—- s–i–i–
s—-. —- –
-e- -i– —.

i —e s-e–
—s —si– —
—- — -e—-.
i —– see —
–i- —- e—–
—.

Cronmora’s pointing at our protagonist, so I assumed the next word was “you”. “The” would have worked, but another glyph had dibs on the E:

i see you
–e -e– e-ou–
-o -e s-oo-i–
–ou–!

e-ou– o-
you- s-ui–i–
s—y. —- -o
-e- -i– you.

i —e s-e–
–ys -u-si– you
—- -o -e—-.
i -o— see you
-ui- —- e–o–
-o-.

Years of watching Wheel of Fortune were about to pay off!

Only one English word fits the pattern for “e-ou–”, and that’s “enough”:

i see you
–e -e– enough
-o -e snoo-ing
–oun-!

enough o-
you- s-ui–ing
s—y. —- -o
-e- -i-h you.

i h–e s-en-
–ys nu-sing you
—- -o he—h.
i -on– see you
-uin -h– e–o–
no-.

After a certain critical mass, each new letter makes more words stand out. On the other hand, impossible words start appearing when guesses go wrong. Naturally, I go a little mad every time I come across a native name. “‘Bonmari’? What’s that? Where’s my mistake?” And then later: “‘Monbari’? Okay, Eldon, I see what you’re up to!” Thank the humans, you don’t do that often!

“you-” is revealed, which is probably “your”:

i see you
-re -e– enough
-o -e snoo-ing
-roun-!

enough o-
your s-uir-ing
s-r-y. —- -o
-e- -i-h you.

i h–e s-en-
–ys nursing you
—- -o he—h.
i -on– see you
ruin -h– e–or-
no-.

The next letters to fall: A (are); P (snooping, not snoozing); D (around); and F (of). The result:

i see you
are -e– enough
-o -e snooping
around!

enough of
your s-uir-ing
s-ray. -a– -o
-ed -i-h you.

i ha-e spen-
days nursing you
-a– -o hea–h.
i -on– see you
ruin -ha- effor-
no-.

The rest is almost readable after that.