After changing the language to English, I still can see on my phone phone dialer Korean symbols, etc. Please if any one know how to remove this "problem" from our device, let us know. Because it gives lags when I dialed the number.
Answer found (Big thanks to "Wolfgart")
1) You need to be root it.
2) Copy and replace LGContacts.apk and LGContacts.odex to the: system>>>app.
3) Set permission to rw-r--r-- (on both apk's)
4) Restart device.
5) Factory reset device. (This is very important.,other wise phone dialer still will lag).