I believe no matter what this is an English only server due to the fact that an admin might be monitoring a situation and if someone is speaking a language they do not understand they could be shouting anything that breaks rp, metagaming etc etc
Hopefully this isn't taken the wrong way but if you can't understand basic English this isn't the right server for them.
I think it might be okay if it is absolutely necessary.
I have had @StejskyCZtranslate some Czech for me in the past but I'm not sure if people should be on the server if they don't speak the language as it might fuck the RP a little.
As said before if people can't speak English properly (I mean the basics) and/or understand it then they need to go to a server that is suitable for them, one that speaks their first language/ a language they understand.
I have seen people translate conversations for people because they don't understand it in English although they understand basic English. I wouldn't go out of my way of I were you to have a conversation in a forgein language as this server is for English speaking people and people need to understand what they're saying.