The English accidents, err accents in Freelancer don't sound anything like the British accents I've heard, they sound more like a bad rendition of Dick-Van-Dyke from the film Bedknobs and Broomsticks.
Following on from what Gig said, if we went further back than Shakespear, old English is indeed very different from modern English, and let's not forget that the English tribe originally came from Germany (as documented by Tacitus 1AD) and settled the Romano-Celtic island of Briton in 450AD (led by a gallant chap named Hengist lol).
Here's an example of how our English language has changed over the years...
Old English...
Dynedan scildas, hlude hlummon. Paes se hlanca gefeah wulf in walde, ond se wanna hrefn, waelgifre fugel. Wistan begen paet him oa peodguman pohton tilian fylle on faegum.
Modern English translation...
Shields clanged, resounded loudly. The lean wolf in the wood rejoiced at it, and the dark raven, bloodthirsty bird. They both knew that warriors intended to provide for them their fill of doomed men.
Jolly little snippet isn't it?
Hengist.