While I'm sure that the Japanese community welcomed these signals (as did many other people who had fun with them during the first week or so
) I still think that a game which is based so heavily on communication and cooperation should support the use of one single shared language rather than a set of different languages, even in case of voice commands. Probably the original idea was that different nations would use these commands only among themselves, but in fact nobody will ever bother to change them to English once they get into a public match.
If you guys start adding more languages to the current list, it's gonna get awfully confusing. And yep, the English transcription at the bottom of the screen doesnt always help, since one of the main points of the voice command is that you do not need to look at chat to know what is going on (sure, the symbols give a clue, but again you do not always have the luxury of looking at them in tense moments).