I is am certain
there are more complex languages than English, haven't encountered any, however.
We need to do some housekeeping. My pet bug-a-boo, the subjunctive mood.
Let us return to the full use of the subjunctive, that the true meaning of words might better be expressed.
Return grammar and syntax to our schools' curricula, remove all this absurd 'no child left behind' nonsense.
Require of all immigrants the exact same level of language competency which European countries demand of their immigrants: Sufficient passive understanding to obey and follow laws and regulations relevant to safety. Adequate active competence to negotiate everyday tasks such as shopping, holding a job, coping with emergencies.
Even German can be mastered at such a low level within six months of study. Such competence in English requires more than six months, I will grant that.
Nobody ever demanded I abandon my 'culture' when I came to Germany. They very rightly insisted I master the language and were more than willing to help me do so. My German and Italian (and Scottish and even one Irish grandmother) all managed to learn English and hold down jobs when they came to the US, all of them were speaking and writing in the language before they had been here for two years. None of them were given any extra help nor were exceptions made for their special needs, the Irish, in fact, often confronted 'No Irish need apply'.