Do markets that share a domain also share languages?
Yes. Markets that use the same primary domain configuration share its available languages. Adding or removing a language affects the markets using that configuration.
For example, if the United States and Canada both use mystore.com, adding Spanish makes it available through that shared domain. A market using its own domain, subdomain, or regional subfolder can have a separate language configuration.
Review Shopify admin → Markets → Languages and domains before changing the available languages. See Shopify's international domains guide.
If you're not sure which of your markets share a domain, email us at [email protected] before you add or remove a language. We'll help you review your setup.