I can't speak for the events team, but I know that the FAQ team is always open to hiring those who speak languages besides English. We want to hire those who don't speak English.
For reasons of simplicity I used the example of Dutch, but other groups can do the same thing. I know at times Zone had a large number of French speaking players.
The Dutch players don't have the best understanding of English, but they are able to help other Dutch players. The FAQs that don't speak English as a first language now have tags ex: Jasper - Dutch - (FAQ)
The events team can hire non English speaking ETs as well. All that is required is someone able to translate a bunch of messages. For example if we translate a message, we can prepared the message for player who speaks Dutch (Ex: <account> won the event!), they are able to insert the account name in those messages written before the event.
I admit there are some instances those messages won't work, but those messages can deal with a large part of not speaking English. Even though Dutch players don't speak English as a native language, with hard work the Dutch players can overcome those difficulties. Another advantage of hiring staff members able to speak different languages is in some instances the Dutch players are able to cover time zones that English speaking players are not able to cover.