I've had a streak of games that have literally forced me to post on this forum.
Ever since the games full release, I have had nothing but Spanish speaking players in my games, and not just one or two, but maybe about 50% of the games I get put into now, I am the ONLY English speaking player on EITHER team, this makes communication IMPOSSIBLE, which is what the whole game is about, and teamwork is also one of the main advertising points of this game, and it sure as Hell doesn't deliver in that regard anymore.
Before the game's full release the match making system wasn't fully working or meaningful, but it wasn't completely terrible, and I was matched into games with other players that were also competent players and were willing to communicate in sentences that advanced beyond 'JAJAJAJAAJAJAJAJ FUCK NOOB REPORT'.
I currently queue on EU west and NA east, depending on where I am currently, and in Europe it's Russians LITERALLY invading servers, and in North America it's EXACTLY the same with South Americans, this is genuinely unacceptable from a developer like Valve.
I have no problem at all with where someone is from, as long as they are able and willing to communicate and work as a team, in one of the most teamwork based games around currently. If I select English speaking servers, I am fully expecting to be able to communicate with my team in the language that I have chosen.
The language selector which Valve implemented a long time ago has done literally nothing to alleviate the invasion of Russians and South Americans.
I do not join anything but English speaking servers because it would be disruptive and detrimental to mine and everyone else's experience if I couldn't communicate.
It's not just communication that's the problem, if you are unlucky enough to get solo queued into a South American 3-4 player stack, and have the audacity to ask them to speak English on a North American, English speaking server, enjoy being called a 'gringo' and a racist, and being endlessly reported.
I know this has been a point of debate for a while now, and honestly, it probably will be until Valve make an actual statement or do something about it, because it is literally forcing players, new and old out of the game completely because they are unwilling to deal with it.
Though it's nice to see Valve has graced us with yet more cosmetic items and chests, because everyone knows that's what the game is really about.