Picks the built-in strings that best match the requested locale(s), falling back to English when none is supported.
One or more BCP-47 tags in priority order (e.g. 'ja', ['fr-CA', 'fr', 'en']). Pass undefined to auto-detect from the browser (navigator.languages).
'ja'
['fr-CA', 'fr', 'en']
undefined
navigator.languages
The resolved PdfrxStrings.
Picks the built-in strings that best match the requested locale(s), falling back to English when none is supported.