Hi Luca, great and very pragmatic question—language in Windows can be sneakily persistent!
What Actually Happens When You Choose a Language?
- First Boot Language Selection:
The language you choose here sets the display language for Windows, and typically also the system locale (used for non-Unicode programs, formatting, etc.).
- Preinstalled (OEM) Systems:
Laptops sold in Spain often come with a “single language” image preinstalled (Spanish), but many nowadays allow international language packs.
If You Pick Spanish Now
- Everything will be in Spanish:
System menus, welcome screens, built-in apps, even the Microsoft Store.
- Switching to English later:
You can add Englishlanguage packs and set English as the display language. However:
- Some remnants (like initial “Welcome” messages, system folders, some preloaded apps, and that notorious lock/login greeting) may still appear in Spanish.
- System-wide prompts, or certain parts of Safe Mode/recovery, may default to the “original” (Spanish) installation language.
If You Pick English Now
- Most of Windows will be in English:
However, on a Spanish-market device, some hardware drivers, OEM support resources, or bundled apps might still appear in Spanish.
- Switching to Spanish later:
You’ll face the mirror issue—almost everything in Spanish, but some “core” leftovers remain in English.
Why Does This Happen?
- The base system language gets “baked in” at setup, hidden deep for things like Recovery Environment and Startup screens.
- Pre-installed OEM images are especially notorious: Sometimes preloaded recovery partitions or apps remain in the original language, no matter what you change in settings.
How to Make Language Change As Universal As Possible
For
absolutely pure single-language installs, the only guaranteed method is a
clean install using an official Microsoft ISO in your language of choice (by downloading the ISO in English/Spanish and performing a fresh install). This overwrites any “OEM” or legacy leftovers.
However, on a new machine, this is usually overkill. With Windows 11, language packs work very well for daily use. Minor artifacts do remain, but:
- Everyday interface, settings, and built-in apps will be in your selected display language.
- Recovery screens and the base “Welcome” at login might show in the original language.
Practical Advice
- If you’re moving your digital life to Spanish, set it up in Spanish now.
- If you ever want to go fully English, consider a clean install from an English ISO (not just adding language packs via Settings).
Direct Answer
Summary:
- If you want a “Spanish everywhere” experience, select Spanish now.
- If you want a perfect "English everywhere" computer, do a clean install from an English Windows 11 ISO.
- Changing language later is good, but not flawless; traces of the original remain.
Let me know if you want step-by-step instructions to do a true clean install in your preferred language!