Thus , while learning a foreign language students try to look for similarities with their mother tongue . These similarities in many cases depend on individual perceptions and in this way can be deceptive . Modern scientists suggest that the idea that the language produced by foreign learners can never be pure , it is unavoidably influenced by learners ' mother tongue . Sometimes mother tongue affects learning a foreign language so much , that the foreign language becomes distorted . So , the foreign language learnt should be...











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