export interface PluginI18nConfig {
    pluginLanguages: string[];
    siteLanguages?: string[];
}
/**
 * Determines the best available language for a plugin based on the fallback rules:
 * 1. If the requested language is available in plugin translations, use it
 * 2. If the requested language is supported by core packages, use it (if available in plugin)
 * 3. Fallback to the core-supported language that appears first in siteSchema.languages
 * 4. If there isn't any core-supported language in the website schema, fallback to English
 */
export declare function resolvePluginLanguage(requestedLanguage: string, { pluginLanguages, siteLanguages }: PluginI18nConfig): string;
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