Just like with other skills, your attribute has a great impact on this. On page 151 is the table of how many hits you need to understand something in a non-native language.
I don't like that table. With, say, an intuition of 4, you'd need at least 6 points in a language to do any basic technical work (assuming you buy hits when working normally), and that's assuming you specialized in your field.
In reality, technical fields don't require a high level of
language skill at all, since understanding the concepts matter more then understanding the language. And technically inclined people very, very often work in other languages (well, unless English is their native language, I guess).
But yeah, those are the rules.