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fix(i18n): match browser locale tags precisely #39

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Merged
zhengkunwang223 merged 1 commit into from
Sep 23, 2026
Merged

fix(i18n): match browser locale tags precisely #39

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17 changes: 13 additions & 4 deletions frontend/src/i18n.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -285,10 +285,19 @@ const storageKey = "laya-server-locale"

export function resolveLocale(languages: readonly string[]): Locale {
for (const language of languages) {
const value = language.toLowerCase()
if (value.startsWith("zh-hant") || /^zh-(tw|hk|mo)(-|$)/.test(value)) return "zh-TW"
if (value.startsWith("zh")) return "zh-CN"
if (value.startsWith("en")) return "en"
let locale: Intl.Locale
try {
locale = new Intl.Locale(language)
} catch {
// Ignore malformed preferences and continue to the next supported language.
continue
}
if (locale.language === "zh") {
// An explicit script takes precedence over the region's usual script.
if (locale.script) return locale.script === "Hant" ? "zh-TW" : "zh-CN"
return ["TW", "HK", "MO"].includes(locale.region ?? "") ? "zh-TW" : "zh-CN"
}
if (locale.language === "en") return "en"
}
return "en"
}
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