YOU SAID:
Fortnite is becoming less popular
INTO JAPANESE
Fortniteの人気が低下しています
BACK INTO ENGLISH
The popularity of Fortnite is decreasing
INTO JAPANESE
Fortniteの人気は低下しています
BACK INTO ENGLISH
The popularity of Fortnite is declining
INTO JAPANESE
Fortniteの人気は低下しています
BACK INTO ENGLISH
The popularity of Fortnite is declining
That didn't even make that much sense in English.