No offense riot but how haven't you realized its a problem that people on the North American server should speak English why do you allow Mexicans to play on this server and ruin games i honestly don't understand. They auto-lock random champions, don't communicate with their team, and half the time FEED. I have nothing against them racially so don't take this that way but why are they allowed to be on this server and ruin games i really don't understand there should be a basic English test to get onto this server because i can't think of how many times i've lost ranked games because of a Mexican.
Thanks for listening hope something can change about this.

Buddy, Mexico is part of North America...

I don't care then north america shouldn't be a server it should be america + canada and a mexico server then

The thing is, you yankees see someone speaking spanish and automatically start saying **** like "taco burrito donkey show", and most of the spanish speakers in the server are from south america (not mexico). So you need to learn to shut the **** up if you dont wanna get a free report for talking ****. And just play the game.

its the united states... not america. 'mehrica!

Your racism, both against Latin Americans and those who make stupid comments with made up racial slurs about United States Citizens isn't helping. Most places in the world refer to United States Citizens as Americans, but not Mexicans or Canadians as Americans. This isn't correct, but the it does cause even US Citizens to have this misconception.

It would be good to offer Language Preferences, regardless of origin or citizenship. The official language in the US is English, but Canada has two, Latin America has a few. The European server allows language preferences and so should the NA server, or at least add a Latin America server. I'm not sure how many French speakers we have, but we should improve the system a bit.

I've lost too many games to people not speaking English, when I get into a game and someone on my team is just spamming "jajajaja" in chat it makes it close to impossible to win. Mexicans need their own server.

The OP's complaint is valid. In a game undeniably based around communication, a language barrier is a formidable one. Cries of "that's racist!" are sure to emerge, and indeed already have, but these are red herrings. The language barrier is most prevalent in pre-game chat, where there are no pings or other universal markers that transcend languages. I speak spanish fluently, so I am in a better position than many, and still I find it highly frustrating when somebody like a Brazilian comes on and speaks Portuguese or a Quebecer comes on and speaks French. Do they deserve to play the game? Of course. Do they deserve a pleasant gaming experience? Of course. But so do I, and my gaming experience is thoroughly ruined by a player or players that cannot or will not communicate with me. Sure, it may be seen as more benign if they simply don't speak my language, but loss of league points, time, and energy is just as frustrating to be lost by somebody who doesn't speak my language as to be lost by a troll.
My suggestion is this: Add a plugin, or other add-on, to the pre-game champ select screen. Have common phrases in that plugin and, when the button next to the phrase is pressed, the phrase is broadcast in all languages league supports in the chat.
Example: (press button that says "Hi")
Shifty:98 Hello Hola Bonjour etc
Examples of things to include are things such as "I'd like to play top/mid/etc" or "Please don't ban/ban champ X/Y"
I'm sure i'm missing a few things, that other posters will contribute.
Simply remember that this IS a problem, and that shouting RACIST! at the OP won't solve the problem, and is a red herring argument.