Be extremely careful. Many websites offer malware-ridden files. For a version, look for modded communities like:
the OBB zip using a file manager like ZArchiver. You will get a folder named com.popcap.pvz2cthnew .
If you have been playing the standard international version of Plants vs. Zombies 2 for years, you might feel the gameplay has become stale or overly restrictive due to microtransactions. However, there is a vibrant subculture of players who have discovered a "better" way to experience the game: