Start with a local question. Keep the network, language, and delivery settings separate so the result tells you something useful.
Compare the language switch, not just the homepage
Use a Catalan journey as one Andorra test and repeat with the Spanish or French version the site provides. Follow search, product details, and checkout; language can revert between steps. Keep the exit unchanged during this comparison so you can identify a localization issue.
Use neighbouring routes as named controls
Spain and France are useful comparison markets for an Andorra project, but neither is an Andorran substitute. Capture the same page, address, and language settings for each run. A cross-border difference then becomes a test result with a known cause to investigate.