does it have local forms or dialects?
Yes, Mercian, Northumbrian, Kentish, and West Saxon.
Old English
The four main dialectal forms of Old English were Mercian, Northumbrian, Kentish, and West Saxon. 
where is the berg metro station located? It is located between Ullevål stadion and Tåsen stations which country are these places found in? Kingdom of Norway when was this station built? 10 October 1934 where does the afore-mentioned country get its name from? The English name comes from the Old English word "Norþweg". was it joined with any other countries historically? Yes, with Denmark and Sweden. when was this union broken? Norway remained in a union with Denmark until 1814 who were the speakers of the old language mentioned earlier? It is spoken in England and southern and eastern Scotland in the early Middle Ages
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Old English [SEP] Dialects
Old English should not be regarded as a single monolithic entity, just as Modern English is also not monolithic. It emerged over time out of the dialects of the colonising tribes, and it is only towards the later Anglo-Saxon period that these can be considered to have constituted a single national language. Even then, Old English continued to exhibit much local and regional variation, remnants of which remain in Modern English dialects. The four main dialectal forms of Old English were Mercian, Northumbrian, Kentish, and West Saxon. Mercian and Northumbrian are together referred to as "Anglian". In terms of geography the Northumbrian region lay north of the Humber River; the Mercian lay north of the Thames and South of the Humber River; West Saxon lay south and southwest of the Thames; and the smallest, Kentish region lay southeast of the Thames, a small corner of England.