Didn't know where to post this so I figured I'd post it here. There was an interesting question I asked myself just a little bit ago, "What languages does each character speak?"
Though this works well as a general Nintendo game question, it's interesting for Smash because if these characters ever met and tried to converse, how many of them would actually understand each other?
So, I thought I'd go by each series and do my best to determine which language each character/series speaks. (Note, this only considers the characters that actually do talk.)
series speaks English. Every character is shown to speak English on many occasions, and this applies to all real-world regional versions of the games.
is heavily implied to speak English because it shares the same language as the Mario series.
series characters speak animal, with occasional uses of English by several characters. (How the crap do they do that? Perhaps its more impressive that the Mario characters can UNDERSTAND animal?)
series has been confirmed to speak both modern and ancient variants of the fictional Hylian language.
speaks Yoshi.
series is too hard to pin down. Could be a fictional language, but there's no indication either way.
series most likely speaks a variant of Greek.
speaks English. He's a boxer from New York, so it's no big surprise.
series speaks an unnamed fictional language, and has been demonstrated so.
series most likely speaks English, as the series is known to be a large cultural reference to America in general. Both Ness and Lucas pronounce all of their PK abilities in English as well.
series probably has several different languages strewn about. However,
Captain Douglas Jay Falcon ABSOLUTELY speaks English. HYES!
series most likely speaks EBEBEBEBEBEB. Joking aside, Star Fox Adventures is only dubbed in English, therefore the language at that point is implied to be English. This isn't confirmed fact, but a high likelihood. Also, the terms and names used throughout the series are pronounced in English.
series most LIKELY speaks English. The Adventure series and Shadow the Hedgehog imply a US-styled country that would most likely speak English. Has also crossed over with Mario, whom speaks English. Even in the Japanese dubs, Sonic enjoys using English phrases.
series might also be English. His Japanese name is even pronounced in English (Rockman). His maker is Dr. Thomas Light. That's a very western name, implying a western language. (Also had a crossover comic series with Sonic, whom I also believe speaks English.)
likely speaks English, since a lot of English terminology is
written all over FF7. Japanese plays aren't very likely to be named "Loveless." (If Kingdom Hearts were to be included in the language department, I'd have to write an essay about all the languages that have to be accounted for because of many cultures of the various Disney worlds used.)
is hard to determine a language for. However, might be English due to "Wii Fit" being a rather English phrase. Cannot be certain towards any language, really.
series likely speaks English, among other alien dialects. Fusion and Other M displayed the existence of characters with western names such as Adam Malkovich and Anthony Higgs. Also, Zero Suit Samus speaks English in all versions of the Smash Bros she's in.
speaks Animalese. Fact.
speaks WAKAWAKAWAKAWAKA. Otherwise, literally any other language is possible.
speaks English, but also knows and occasionally speaks Japanese.
speaks Japanese, and most likely knows English. May potentially know a few other languages, but Japanese for certain.
has been confirmed to speak English, but knows six languages in total. Among these are probably Russian, French, Japanese, Yupik, and possibly Arabic.
this is where it starts getting difficult. Pokemon make sounds. These sounds were interpreted as the names of each creature. Therefore each Pokemon only speaks their own name. However,
and
do in fact speak human languages in Smash. Therefore, I had to actually put significant thought into it. Either the Pokemon world has a different language for each region (the region's being based off of real-world regions with their own languages), or more likely the Pokemon world has one giant shared language that is known across all regions.
It's too difficult either way, especially since most Pokemon have their names changed depending on the real-world region of the version purchased.
series is really confusing on their languages. In their crossovers, it's implied that they all speak the same tongue. This might be true over the entire series regardless of crossover. Fates implies the same language as Awakening, which is most likely the same language as what Marth spoke. However, Fates and Awakening both tie Ike into the same language as well. However, there is a largely Norse emphasis throughout the series. Some Greek and Hebrew here and there, but Norse has had a large part in many names of tomes, weapons, and such. Therefore, the most likely language might be Scandinavian, or any of its dialects.
series speaks... well, oh boy. Xenoblade Chronicles 1,2, & X are all implied to be connected in
very spoiler-y ways. But since X's major focal point is New Los Angeles, I will defer to English for now. I'd rather not have to dive too far into this rabbit hole, otherwise I'll get sucked into the proverbial void.
And that, I think, covers all the known languages in Smash. Many of these characters speak English... which is odd for a bunch of Japanese created characters.
But if you have any corrections about this, please say so!