#!/bin/bash
SomeText2='<dt i18n="testLabel@@testLabel">Test</dt>'
REGEX_REP="$(echo "$SomeText2" | sed 's/i18n="[^"]*@@\([^"]*\)"/[translate]="'"'"'\1'"'"'"/')"
echo "$REGEX_REP"
# <dt [translate]="'testLabel'">test</dt>
IyEvYmluL2Jhc2gKU29tZVRleHQyPSc8ZHQgaTE4bj0idGVzdExhYmVsQEB0ZXN0TGFiZWwiPlRlc3Q8L2R0PicKUkVHRVhfUkVQPSIkKGVjaG8gIiRTb21lVGV4dDIiIHwgc2VkICdzL2kxOG49IlteIl0qQEBcKFteIl0qXCkiL1t0cmFuc2xhdGVdPSInIiciJ1wxJyInIiciLycpIgplY2hvICIkUkVHRVhfUkVQIgojIDxkdCBbdHJhbnNsYXRlXT0iJ3Rlc3RMYWJlbCciPnRlc3Q8L2R0Pg==