The interface language was English unless Japanese was chosen in
Settings ▸ General ▸ Language. Language now has a Match System choice
(`general.language` = `system`), the new default: the operating
system's interface language where EffectCraft has a translation
(Japanese), else English, as After Effects installs in the system's
language. English and Japanese can still be chosen; a language chosen
before stays. The browser build stays in English with Match System,
since it has no Japanese font of its own.
The system language comes from sys-locale (MIT OR Apache-2.0, no
dependencies on the desktop platforms), on desktop builds only.
Tests: match_system_uses_the_system_language_where_there_is_a_catalog
(i18n), interface_language_is_validated_persisted_and_backward_compatible
(engine).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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