GIVE ANSWERS - English

I’ve given an explanation here about what is going on between those two different expressions.

https://polyglotclub.com/language/english/question/35577

In short, ”I’m here to speak English” is ”officially” correct, but ”I’m here for speaking English” is very often used ”unofficially” by native English speakers.

As to why the gerund form ”I’m here for speaking English” has evolved, that’s a quite long answer which would be best done on that question thread.

I guess that there is a difference in the meaning btw
”I’m here to speak English”, and ”I’m here for speaking English”.

So, I hope somebody tells us about it.

If we said ”I’m here for” then we use the ”v+ing”
so it’s ” I’m here for speaking English.