See pictures below in every step for clearer instruction
Step 1: Go to Mjform downsite: --> viewtopic.php?f=16&t=34
Step 2: Download the site-ja-JP.zip file and admin-ja-JP.zip file.. Click the .zip file pointed by the arrow on the picture below. Once you clicked the link it will download automatically
Step 3: Locate your downloaded site-ja-JP.zip file and extract to "site-ja-JP"
Step 4: locate the extracted site-ja-jp folder
Step 5: Open the folder site-ja-jp and copy the folder "ja-jp"
Step 6: Go to your localhost xampp folder -->Go to htdocs folder-->Go to components folder-->Go to com_mjforms folder-->Go to language folder and paste the ja-JP folder here.
Now you will see that the language folder have a ja-JP folder already
Step 7: Now, Locate your downloaded admin-ja-JP.zip file and extract to "admin-ja-JP"
Step 8: Open the folder admin-ja-jp and copy the folder "ja-JP"
Step 9: Go to your localhost xampp folder -->Go to htdocs folder-->Go to components folder -->Go to com_mjforms folder-->Go to language folder and here paste the ja-JP folder. Once you paste the ja-JP folder you will see like the picture below
Now we already installed the new Japan language on Mjform