I despise it even more when they have "foreigners" speaking their native language but it's so broken and butchered you can't even understand it. I'm not even talking about some obscure languages but it's also usually the case whenever a character starts speaking German, Russian, French, Mandarin, etc. Which is ridiculous as I'm sure it's not that hard to find an actor in Hollywood who can actually speak one of those languages or at least find a fluent voice substitute and use it...
Signs and documents etc. that are written in gibberish are even worse; just screams of laziness and ignorance... Especially the case when it comes to Russian language. Best example:
So apparently his name is supposed to be Foma Kiniaev but the "original Cyrillic" says Ashchf Lshtshfum