I think the request is fair and reasonable since we can't all read Greek.
No, it's a completely unfair and unreasonable request to be making on a Greek forum. Not to mention racist.
Good manners would have you try to include everyone in a public conversation. If me and Tzaki were to start publicly conversing in German you would feel aggrieved at having been left out, and rightfully so.
Why do you assume you deserve to be included?