Shopify updated its multiple languages feature at the beginning of 2020. We added multi-language support also to Parcely app which is aligned with Shopify default language settings.
Make sure you have set up all needed languages in your store (settings/store languages), before you start configuring Parcely app languages. We recommend using one of the following store language apps suggested by Shopify to translate your store.
Your store must use URL language code (like this https://testikaspood1.myshopify.com/et/cart) for Parcely app translations to work.
Check this GIF and see how to set up translations in Parcely app: