YOU SAID:

Greetings I am the creator of language I speak them all fluently

INTO JAPANESE

ご挨拶私は彼らがすべて流暢に話す言語の創造者です

BACK INTO ENGLISH

Greetings I am the creator of languages that they all speak fluently

INTO JAPANESE

ご挨拶私は、彼ら全員が流暢に話す言語の創造者です。

BACK INTO ENGLISH

Greetings I am the creator of languages that all of them speak fluently.

INTO JAPANESE

ご挨拶私は彼ら全員が流暢に話す言語の創造者です。

BACK INTO ENGLISH

Greetings I am the creator of a language that they all speak fluently.

INTO JAPANESE

ご挨拶私は彼ら全員が流暢に話すことのできる言語の創造者です。

BACK INTO ENGLISH

Greetings I am the creator of a language that all of them can speak fluently.

INTO JAPANESE

ご挨拶私は彼ら全員が流暢に話すことができる言語の創作者です。

BACK INTO ENGLISH

Greetings I am the creator of a language that allows them all to speak fluently.

INTO JAPANESE

ご挨拶私は彼ら全員が流暢に話すことを可能にする言語の創作者です。

BACK INTO ENGLISH

Greetings I am the creator of a language that allows them all to speak fluently.