denormalize archived-redirects-from-213-to-217.json by language (github#24996)

* denormalize archived-redirects-from-213-to-217.json by language

* refactor again

* oops

Author: peterbe

lib/languages.js

@@ -53,7 +53,7 @@ if (process.env.ENABLED_LANGUAGES) {
 
 export const languageKeys = Object.keys(languages)
 
-const languagePrefixPathRegex = new RegExp(`^/(${languageKeys.join('|')})/`)
+export const languagePrefixPathRegex = new RegExp(`^/(${languageKeys.join('|')})/`)
 
 export function pathLanguagePrefixed(path) {
   return languagePrefixPathRegex.test(path)