Yes, your understanding is correct. By default, Shopify will display your website in the language you’ve set as the default, which in your case is English. It won’t automatically detect the user’s location or system language and adjust the website language accordingly.
For automatic language detection based on the user’s location or system language, you would need to use a third-party app that supports this feature. These apps can detect the user’s location or browser language settings and display your website in their preferred language, if you’ve provided the translations.
I hope this clarifies your query. If you have any more questions, let me know!