Is 'dreggs' English, or is it actually Swedish?

'Dreggs' is a word borrowed from Swedish 'drägg'.

dreggs

(details not available)

See 'dreggs' on the Loan Words Map

See more loan words from Swedish.

note: Middle English: probably of Scandinavian origin and related to Swedish drägg (plural).
Etymology: -

See more loan words from (unknown date).

When you say 'moped' are you speaking Swedish?

'Moped' is a word borrowed from Swedish 'moped'. The word entered the English language some time around 1955.

moped [noun] [1955]

A lightweight low-powered motorbike that can be pedaled

See 'moped' on the Loan Words Map

See more loan words from Swedish.

Etymology: Swedish, from 'mo'tor motor + 'ped'al pedal

See more loan words from 1950s.