Is it possible to detect substrate Celtic influence on English? Celtic language decline in England

in case of swift language-shift, involving second-language acquisition adults, should expect these learners imperfect acquisition of old english grammar , pronunciation affect language. yet, there no consensus such effects visible in surviving evidence; recent synthesis concludes evidence celtic influence on old english sparse, means remains elusive, not did not exist .

reasons why celtic influence on english may not visible include:

still, although there little consensus findings, extensive efforts have been made during twenty-first century identify substrate influence of brittonic on english.

celtic influence on english has been suggested in several forms:

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