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Table 3 BLEU score

From: MarianCG: a code generation transformer model inspired by machine translation

BLEU score

Interpretation

Less than 10

Almost useless

10–19

Hard to get the gist

20–29

The gist is clear, but has significant grammatical errors

30–40

Understandable to good translations

40–50

High quality translations

50–60

Very high quality, adequate, and fluent translations

Greater than 60

Quality often better than human