well, I have the problem that I speak at least 4 languages enough to read everything without trouble and another 2 with some assistance. That means I should write posts in all those I do not agree. I have chosen to accept English as a main language to write my posts (sometimes, but rarely adding dutch or german) What I do like to do is write comments in the language another post is written in.
The thing is here that steem is not exclusively english and that there are really some communities that are really growning and creating their own ecosystem.
I find that cool, this will also help in creating the Steem middle class that we so desperately need