Nyan meaning cat in japanese... Maybe as a cutsie way for children but I can tell you right now the correct word is neko...
Edit: The rest of that... I can't even call it a sentence just isn't even worth touching. I feel like punching a baby reading it.
I thought maybe Nyan was the japanese onomatopoeia for a cat, but google says otherwise~
Bear: guo- ぐおー
Birds: pichu pichu ぴちゅぴちゅ (tweet tweet?)
Bell cricket: ri-n ri-n りーんりーん
Cats: nya-o にゃーお (meow)
Cats (alternative): nya にゃー
Cats (purring): goro goro ごろごろ (purr)
Chicks: pi-pi- ぴーぴー (peep peep)
Cicada: Varies by species.
Cicada #1: mi-n mi-n みーんみーん
Cicada #2: ji- ji- じーじー
Cicada #3: *See below!
Cow: mo- もー (moo)
Dogs: wan wan わんわん (woof woof or bow wow)
Dove: po. po. ぽっぽっ
Duck: ga- ga- がーがー (quack)
Elephant: pao-n ぱおーん (no English transliteration??)
Flies: bu—n ぶーーーん (buzz)
Fox: ken ken けんけん (no English?)
Frogs (big): gero gero げろげろ (ribbit)
Frogs (small): kero kero けろけろ (ribbit)
Goats/sheep: me-me- めーめー (baa)
Horse: hihi-n ひひーん (neigh)
Lion/tiger: gao- がおー (roar)
Katydid: gacha gacha がちゃがちゃ
Monkey: kiki or ki-ki- きき or きーきー
Nightingale: ho— hokekyo! ほーーーほけきょ!
Owl: ho– ほーー (hoo)
Pig: bu-bu- ぶーぶー (oink oink)
Pig (alternative): buhi buhi ぶひぶひ (oink oink)
Rat/mouse: chu- chu- ちゅーちゅー (squeak)
Rat/mouse (alternative): ki- ki- きーきー (squeak)
Raven/crow: ka- ka- かーかー (caw caw)
Rooster: kokekokko- こけこっこー (***-a-doodle-doo)
Turtle: mu む (no English voice)
Wolf: wao—-n わおーーーーーーん (how do you spell this in English??)
Woodpecker: kakakakakaka かかかかかか
*Cicada #3: A specific type of cicada, called tsukutsukuhoshi (or tsukutsukuboshi), has a very long and amusing “voice”, whose transliteration varies from speaker to speaker. Some examples are: (Basically, these start slow, speed up, and then climax with a long final vowel)
*tsukutsukuo-shi, tsukutsukuo-shi, tsukutsukuo-shi, … (repeats indefinitely) …o-shitsukutsuku, o-shitsukutsuku, suttokoji-o-, suttokoji-o-, suttokoji-o-, jiiiiiii~.
* つくつくおーし、つくつくおーし、つくつくおーし、つくつくおーし…… おーしつくつく、おーしつくつく、すっとこじーおー、すっとこじーおー、すっとこじーおー、じぃぃぃぃ~。
*tsukutsukuo-shi, tsukutsukuo-shi, tsukutsukuo-shi, tsukutsukuo-shi, … (repeats indefinitely) …tsukutsukui-o-, tsukutsukui-o-, tsukui-o-, tsukui-o-, tsukui-o, iiiiiiii~.
*つくつくおーし、つくつくおーし、つくつくおーし、つくつくおーし…… つくつくいーおー、つくつくいーおー、つくいーおー、つくいーおー、つくいーお、いぃぃぃぃ~。