Do I require any games?

uhh... when you install Garry's Mod, the very first thing Half-Life 2 gets is a English version already. double check your addons, there might be something that might be corrupting it

Can you send me the link to the English Overwatch addon

no it dosent

Do I require this? https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=893305488

no

is it still playing english?

I did that and none of the audios are playing

All you do is hit subscribe on the workshop, and it'll be on your game automatically. you don't need to really do anything else

How do I make this work in game?

Nope, This is just meant for if anyone ever wanted Overwatch in just Chinese. Nothing is required to use this mod~ enjoy your time!

Do i need any other addons to make this work?

妙啊