Multilingual support (Spanish for LATAM)

[truthixify]

Tier: L (1-2 weeks) Type: i18n

Context

feature

Scope

Stellar has a strong LATAM developer base. Demo needs Spanish first; framework should make adding other locales trivial.

Acceptance criteria

• Set up i18n framework (react-i18next)
• Extract all user-visible strings to src/i18n/en.json
• Wire t() into components
• Locale switcher in header
• Persist preference in localStorage; default from navigator.language
• Spanish translations in es.json (native-speaker reviewed)

Files to start with

• All strings extracted
• en.json + es.json complete
• Switcher functional
• CI lint catches hardcoded strings in components

Why this matters

• All src/components/*.tsx
• New: src/i18n/