YOU SAID:
Today is my little brothers birthday, he likes cars
INTO JAPANESE
今日は私の弟の誕生日です、彼は車が好きです
BACK INTO ENGLISH
It's my brother's birthday today, he likes cars
INTO JAPANESE
今日は車が好きな弟の誕生日です
BACK INTO ENGLISH
Today is my brother's birthday who likes cars.
INTO JAPANESE
今日は車好きの弟の誕生日です。
BACK INTO ENGLISH
Today is my brother's birthday who loves cars.
INTO JAPANESE
今日は車が大好きな弟の誕生日です。
BACK INTO ENGLISH
Today is my brother's birthday who loves cars.
Well done, yes, well done!