Step 1: Click on Admin Menu which is on the left side
Step 2: Choose manage language
Step 3: Choose add language
Step 4: Enter the required fields and click on the add language button
Step 5: After clicking add language button that particular language is added to site, further we need to enter translated text for the language. For this click Edit button and enter corresponding translation for English word in left hand side to right hand side field .
Admin Login Page → Enter Credentials → Login → Manage Language → Add Language