if your on PC type Hello and hit tab, it will then have red and green ( ) like symbols. This is system managed so people can talk to people who dont speak the same language. (Hello) will be in English, Japanese and all the other languages that SE supports to the other players, so they'll see the language their game client is listed as (ie in kanji for Japanese)
I personally use it more often then not, hello/thank you/take care/congratulations/etc; you can write quite the novel with the auto translate too. When I was first leveling and hitting new dungeons I had one that said I was new to the content and asked for advice all in auto-translate. I duty with all languages.