No that's factually inaccurate. The games "resulted in a billion dollar merchandise and media industry" more specifically Witcher 2 & 3.

Up till then outside Eastern Europe the books were relatively unlnown. Proof of this is that they only finished translating the books into English after the Witcher 3 was released.

After Witcher 2 was released there was 1 set of short stories and maybe 2 of the novels in English.

So no. This is just not true. At least in English speaking world.