Some background first: I am in a East-Asia-based company. I am not a foreigner so basically there is no cultural gaps in this case. It's kind of stereotype to say this but I do think I have to really take care about the atmosphere in workplace. My colleagues values personal connection so much that I always feel awkward when I distance myself from them. They are professional and kind folks, but I just don't needs these people to be my friends.
So, let's get started from calling this guy Z, who I refer to as a seemingly irresponsible colleague.
Due to some business strategy announced from top managers, Z and I are assigned a job that we will attend a technical conference in North America. We will have to join a discussion session to present our showcases and experiences, and hopefully that we can establish credits for our company.
Sorry for another stereotype but truth here: Most people here are afraid of speaking English, and actually I myself am too. Listening and speaking in response as a normal communication process is like a few light-year out of our comfort zone.
Z is a person fun to be around. Everyone likes him. But since we are assigned this job, he keeps talking to me something like,
"Hey, how about this: I give you my part, and you present for both of us?"
"What are you going to do then?" I always try very hard to calm myself down.
"Canada!" He smiles as usual, "I will bring my wife there and I don't want she feel bored."
Such situation can even happen under our direct manager's nose, like
"Oh my English just can't afford it. I want him to take over these job!!!" Z.
The reason why I did not fight back is that he hasn't really done anything towards that direction. And the atomosphere counted here. My direct manager had no response on this conversation in our Slack channel, which also make me very disappointed.
And now, the rehearsal to a top manager is near. Z starts worrying about if his travel budget will be canceled because of the possibly bad performance of himself.
The story does not end here, and the future is unknown. "What should I do with this guy?" is just a general question. Actually I am more interested in this one: "What will you do with such person in similar situation?"
Just a wild guess, such situation is probably special here in my country, and maybe other near East-Asia countries. We don't have presentation training in regular education programs, so basically everyone is't aware of "presentation" as a social skill until he/she goes to college. The same applies to English education, especially in the Speaking part.
Appreciate for all the answers, suggestions and critics.