Step 1: Login to your FTP or Cpanel
Step 2: Go to the lang folder
Step 3: Go to this path /whmcs_root/lang/overrides
Step 4: Now open the both side overrides folders i.e your WHMCS setup and extracted build
Note: Those who has already the Clientx and upgrading to version 3.0.0
Step 5: Now edit the english.php file or your desired language like we have edited the english.php file.
Step 6: Copy all new language variable for V3.0.0 from here to end and paste it to end of file over your WHMCS file setup at same location and same file.
Step 7: Save the files and repeat the process for other language files
