Ans: Once you install flits code to your store, please follow below steps for the multi-language option.
Step 1: Please open Shopify Admin.
Step 2: Select an Online store.
Step 3: Open Themes section.
Step 4: Click on actions section through live theme section & open "Edit language" Section.
Step 5: You can see below page.
Step 6: Update your language as per your requirements and save it.