Term Kind Topic What it is
Internationalisation i18n practice Internationalisation Designing so that language, region and culture are parameters rather than assumptions — cheap upfront and very expensive to retrofit.
Locale Aware Formatting practice Internationalisation Rendering dates, numbers, currencies and names according to the user's locale rather than the developer's, using the platform rather than hand-written logic.
Locale Fallback Chain Language Negotiation Chain, Locale Resolution Order pattern Internationalisation The declared order in which a system degrades from a requested locale to one it can actually serve - and the decision about which values are allowed to degrade at all.
Pseudo-Locale Testing Pseudo-Localisation, Accented Locale practice Internationalisation Rendering the interface with algorithmically transformed strings - lengthened, accented, direction-reversed - to expose internationalisation defects before any translation exists.