YOU SAID:
Hello peeps join my party
INTO JAPANESE
こんにちはのぞき見が私のパーティーに参加
BACK INTO ENGLISH
Hello peep participated in my party
INTO JAPANESE
こんにちはのぞき見が私のパーティーに参加しました
BACK INTO ENGLISH
Hello peep took part in my party
INTO JAPANESE
こんにちはのぞき見は私のパーティーに参加しました
BACK INTO ENGLISH
Hello peep took part in my party
That didn't even make that much sense in English.