They sneak in because their chances of getting a visa are very slim. This site has alot of info on how the visa and quota system works:
http://www.kkeane.com/general-faq.shtml
They probably don't learn English because they work in menial jobs that don't really require communication skills, and they probably do not socialize at all with people who speak English.
TRICKIE Wrote:
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> I was just wondering about this. When these
> people, usually ones from Mexico or Central or
> South America, come to the US, why do they sneak
> in? Why don't they apply for a work card or for
> citizenship? Also how come many of them never
> want to learn English. This lady who works as a
> custodian where I work, has been in this country
> for 19 years, but still doesn't speak or
> understand English. Neither does her husband who
> also is a custodian.