Add it to your server
In your server's .ini file (servertest.ini by default), add these to the existing WorkshopItems= and Mods= lines, separated by a semicolon (;).
WorkshopItems=3818718796;3818948559
Mods=PvZGarden;PvZGarden_CN
These lines include the mod it requires, as its Steam page declares it:
| Workshop item | Subscribers | Declared in |
|---|---|---|
| PVZ Plants vs Zomboid 简体中文汉化(已过时)3818948559 | 77 | description footer |