English is the most sophisticated 'adaptive' language ever put together by humankind, the language is many times larger than german, the second-largest language, which is several times larger than french.*
English doesn't need 'saving' as you put it, but America needs saving from the scourge of multilanguageitis that infects Quebec, much of Europe, and arguably killed the Roman Empire.
English is the standard for every organization that needs to communicate across cultural boundaries (commerce, law, medicine, science, math, aviation, shipping). Americans push for English from our immigrants to help them become better Americans and thereby strengthen the country.
Leave your superficial, liberal, USA-Hate at the door please.
*'size of language' being defined here by many factors including raw vocabulary, homonyms, homophones, homographs, possible constructions, possible meaning subtleties, word order, prefixes, infixes, suffixes, tenses (and tense-subtitles ex: past pluperfect), etc., many of which don't even exist in other languages.