If the number of your target language does not reach 5, you can add more by:
Clicking on Add language button
Choose the desired language
Check/uncheck on "Publish language after translating"
Click on Next button.
Check/uncheck on elements you want, then click on Translate button
Please NOTE that:
5 is limitation for Shopify normal Paid plans.
If you’re a Shopify Plus merchant, then you can translate your store into 20 languages. More details can be found here.
In this case, if you reached 5 Target language limit but your need is higher, please feel free to contact our Support team.
Hope this helps you much.
Should you need further support, please feel free to contact us via live chat in-app or email us at email@example.com