Where do these malformed questions come from?

You are on to something here. In many languages the infinitive ending is attached to the verb. Latin and its derivatives like Spanish for example. Not like English where the infinitive is made by putting "to" in front. And the word order is more flexible in other languages. And expressing the do is sometimes not done. I believe we have emigrants come here and we pick up on their speech patterns. Speaking nonstandard English is not a good idea. But that is a political and an economic statement You are right. Practice good English.