How on earth would a Chinese person get to Poland 1000 years ago? Get on a train?
im talking about today - your being flipant now.
And you needant go as far as china, look at switzerland (italian, German, French languages yet, similar genes - its all about socio-political forces is language)
How do you explain Christopher Columbus? The Native Americans? Cro-magnon originated in Africa and made his way to Europe, explain that one.
exactly, migration happened, that shows in our genes. BUT language is another kettle of fish and not tied into it. Genes don't determine this.
and the source of ENGLISH as a language is NOT determined by genetics but by HISTORY our genes did not make up the languages BUT human interaction between dominant and submissive. ANd the ANGLE-SAXONS come from where? and they speak what? could it be WESTERN GERMANIC - i think it is, there is back up a plenty. is it to do with genetics. no.
in fact, GREAT example, one girl was here the other day poland_2006 i believe, she Was born in poland and now lives in the USA. she speaks english because of here SOCIO-POLITICAL surroundings - being USA and that being an english speaking area
your defintion dictates she can only speak polish as a first language (as you dont rule out the obvious fact anyone can learn english) BUT she speaks English as a first language NOTHING to do with genetics.