Following scripts offer you that finding Hangul, Katakana, Hiragana, Ganji(Han), Hiragana in your source code (ts file) "^((?!\/\/).)*"means that ignore "// comments". The script uses " property-name" of Regular Expressions. #!/bin/bash BASE_SRC_FOLDER=../src IGNORE_FILE_POSTFIX=( "spec.ts" ) #GREP_PATTERN="^((?!\/\/).)*(\p{Hiragana}|\p{Han}|\p{Katakana})" # for Japanse GREP_PATTERN="^((?!\/\/).)*\p{Hangul}.*" # for Hangul CUR_DIR=`pwd` if [ "`basename $CUR_DIR`" != "script" ]; then echo "Error: you must run `basename $0` in script directory." exit fi echo "Search predefined characters in ts file of ${BASE_SRC_FOLDER} folder." TS_FILE_LIST=`find ${BASE_SRC_FOLDER} -name "*.ts"` for CUR_FILE in $TS_FILE_LIST do let IS_RUN=1 for CUR_IGNORE_FILENAME in ${IGNORE_FILE_POSTFIX[@]} do if [ "${CUR_FILE%${CUR_IGNORE_FILENAME}}" != ${CUR