# If you'd like to omit non-matching lines from the result; add ';d' to the end of the expression.
sed -E 's/(numberPinyin":\s*".*)(v)(.*)"/\1ü\3/gm;t' <<< "['{\"russian\": \"женщина\", \"english\": \"woman, v\",\"numberPinyin\": \"nv3\",\"typeOfChar\":\"character\",\"typeOfTranslating\":\"original\"}',
'{\"chinese\": \"弯竖左钩\", \"russian\": \"вогнутая с крюком влево\", \"english\": \"concave with left hook\",\"numberPinyin\": \"eav\",\"typeOfChar\":\"stroke\",\"typeOfTranslating\":\"byStrokes\"}',
'{\"chinese\": \"弯竖右钩\", \"russian\": \"вогнутая с крюком вправо\", \"english\": \"concave with right hook\",\"numberPinyin\": \"vm2\",\"typeOfChar\":\"stroke\",\"typeOfTranslating\":\"byStrokes\"}']"
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for SED, please visit: https://www.gnu.org/software/sed/manual/html_node/The-_0022s_0022-Command.html